release-notes-4.0

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<h1>What's new in dCache 4.0<br/>
<small>Release notes</small></h1>
</div>

## Highlights

In preparation of upcoming changes, dCache 4.0 contains many small architectural improvements, 
bug fixes and structural changes that will be needed for new features that will be incorporated
into later releases. Apart from greater stability and improved error handling in many circumstances,
there are few user-visible changes in this release.

For systems where local users also tend to be members of VOs, dCache 4.0 brings a helpful change in 
the way group membership is assigned. gPlazma can now be configured so that several authentication 
plugins cooperate in selecting and setting the primary GID of a user account, so that a user can
work in a mixed environment where he or she is recognized through both a local account and a VOMS identity.

In order to facilitate moving clients to using different checksums, the pools can now be configured to 
calculate several checksums for any uploaded file at once. A file may thus get both an ADLER32 and an MD5 
checksum, for example.

## Incompatibilities

The change to gPlazma mentioned above may change the behaviour of some more exotic gPlazma configurations.
In case a configuration exploits the fact that previously, attempts to assign multiple primary GIDs
led to failures, any behaviour built on that assumption will now change because the authentication
plugins will cooperate to assign one of the GIDs as primary and the other as secondary.

## Acknowledgments

Once again, we have received important code contributions from our users. 

We would like to thank Christoph Anton Mitterer for his work on systemd integration, 
Onno Zweers for spotting an https issue with WebDAV, and Robin Wenzel for his contributions
during the HTW course.

## Differences from dCache v3.2

The notes for [release 4.0.0](#release4.0.0) detail the differences
from dCache 3.2.  Please read this section *very carefully* when
upgrading from this version.

## Release 4.0.47

### pool

Attempting to start a full checksum scan (with `csm check *`) while an
existing scan is still running is no longer reported as a bug.


### Changelog 4.0.46..4.0.47

<!-- git log 4.0.46..4.0.47 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[a7a610b876](https://github.com/dcache/dcache/commit/a7a610b8769e2750d8bb5c2a5f1adda84b6ad6b4)
:   [maven-release-plugin] prepare release 4.0.47

[18178625ea](https://github.com/dcache/dcache/commit/18178625ea05733abf99187d0cd5844607983fb1)
:   pool: avoid IllegalStateException in 'csm check *' command

[6e511978d2](https://github.com/dcache/dcache/commit/6e511978d285e1c1397db26c790e6c39c1ccc1a0)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.46

### alarms

To ease troubleshooting, the POOL_DEAD alarm message now includes the pool name.

### ftp

This release fixes an issue where a NullPointerException was thrown
by FTP doors. The error occured only in very specific circumstances:
a client would need to either download a file
or issue a LIST, NLST or MLSD command after uploading a file through
a passive door using proxied transfers.

### pinmanager

A bug was fixed where PinManager's `bulk ls` admin command yielded a 
NullPointerException if the optional argument was omitted.

A typo prevented the error message "Remote connection failure while unpinning..." from
appearing completely and correctly in the logs. The error message string now contains
the message string of the underlying Exception, hopefully providing helpful details for 
troubleshooting.

### pool

A regression that prevented a replica's position in the LRU queue for garbage collection from being updated was fixed.

### webdav

Users asserting the "admin" role would occasionally receive 
NullPointerExceptions when trying to transfer files through 
WebDAV. This release fixes that issue.


### Changelog 4.0.45..4.0.46

<!-- git log 4.0.45..4.0.46 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[ad22a2ca14](https://github.com/dcache/dcache/commit/ad22a2ca146969bb31529e87aaadb1a43b9f3e1b)
:   [maven-release-plugin] prepare release 4.0.46

[c6116f0613](https://github.com/dcache/dcache/commit/c6116f0613ed04eeae9ade13aebd8736ffb4263a)
:   UnpinProcessor: fix assumed typo `{)`

[ec3c42aa3b](https://github.com/dcache/dcache/commit/ec3c42aa3b86bfd234fa556d04b7aee8125cdf21)
:   webdav: allow transfers as user with role 'admin'

[fffa6a2cc0](https://github.com/dcache/dcache/commit/fffa6a2cc0fb3b515523e25bc9fdece5595d7d4b)
:   pinmanager: avoid NPE if no argument given for 'bulk ls' command

[2594616811](https://github.com/dcache/dcache/commit/2594616811e1b6e86275622db0aa3ea11154c98a)
:   alarms: add pool name to POOL_DEAD alarm

[247bea8052](https://github.com/dcache/dcache/commit/247bea80526e1168dcd886a59705a04c9b48f79e)
:   ftp: avoid NullPointerException after passive upload

[d8630797e3](https://github.com/dcache/dcache/commit/d8630797e37f85aa7abcd84f1fe16b3f5f830c7f)
:   pool: fix reordering of removable replicas on access

[088711ee5a](https://github.com/dcache/dcache/commit/088711ee5aa7b7ef892608f5a893b6fc5116cb65)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.45

### Changes affecting multiple services

Stage request from unknown locations resulted in NPE in dcap and pinmanager services.
this is now fixed and using `dccp` to stage a file should work even if the location is unknown. '--'

### resilience

The current release fixed  race condition on replica state and no `inaccessible file errors` occures  for a newly written file.


### Changelog 4.0.44..4.0.45

<!-- git log 4.0.44..4.0.45 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[20c8263](https://github.com/dcache/dcache/commit/20c8263a7bd109d83595883bf0ff6daa7bde610f)
:   [maven-release-plugin] prepare release 4.0.45

[722f061](https://github.com/dcache/dcache/commit/722f061dfd8e5b5a73da37e94dc593bfcbb5a96f)
:   dcap/pinmanager: stage request for unknown location results in NPE

[100ed5f](https://github.com/dcache/dcache/commit/100ed5f4cd7a9095a5da04f4213869c1801d2192)
:   dcache-resilience (stable branches): fix race condition on replica state

[723e709](https://github.com/dcache/dcache/commit/723e7098c638e2582700547281344baa7df15e56)
:   [maven-release-plugin] prepare for next development iteration

[ceb980c](https://github.com/dcache/dcache/commit/ceb980cd6d56b967eeaba6e4a4c3c230eb96ab9c)
:   resilience: adjust synchronization of file operation removal from map

## Release 4.0.44

### pool

An unhelpful error message "Parameter `directory` is not a directory" is
replaced with one that provides information on which directory is
missing.

Update error messages (previously "Could not create mover") to provide
more information about why the mover could not be created.

The pool no longer logs configuration or deployment problems that
prevent the pool from creating a mover as if that problem was a bug.

The current release fixed certain error cases, where a pool is unable to create a mover are no
longer logged as a bug in dCache.

### transfermanager

The current release fixed a NPE  if transfer was cancelled.



### Changelog 4.0.43..4.0.44

<!-- git log 4.0.43..4.0.44 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[e149388](https://github.com/dcache/dcache/commit/e1493883a69eaa217270f488810c8f8e178cad83)
:   [maven-release-plugin] prepare release 4.0.44

[577a54d](https://github.com/dcache/dcache/commit/577a54ddcafc142623ea41791ef2362c3faeeb22)
:   pool: avoid throwing a RuntimeException for non-bugs

[d3ec801](https://github.com/dcache/dcache/commit/d3ec801989b0bba76bf1343794124ea873b71849)
:   pool: avoid log-and-throw anti-pattern

[1f222d3](https://github.com/dcache/dcache/commit/1f222d3774a62ceb2552e53a478bd15f28f1778a)
:   transfermanager: avoid NPE on shutdown

[d4c1cbe](https://github.com/dcache/dcache/commit/d4c1cbe05f6523ceeaad84fc434482f9e97290b6)
:   pool: throw exception with meaningful error message

[d307641](https://github.com/dcache/dcache/commit/d3076416b7ed995c662e0e0cfbfb2b7675274f90)
:   pool: update error messages to make them distinct

[70378b3](https://github.com/dcache/dcache/commit/70378b3204df23d363fff0ddd8fc86825c4bd427)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.43

### dcache

Jetty version is updated to  9.4.12.v20180830.

### resilience

It is now possible to record resilience activity (on the receiving
end), which may prove useful in understanding
behaviour.

In rare circumstances  dark removes  can result in data loss by 
removing of all replicas for a given file. The current release fixed the issue.

Pool operations now can successfully be restarted from the
command line after they have been shutdown, without
restarting resilience.



### Changelog 4.0.42..4.0.43

<!-- git log 4.0.42..4.0.43 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[7871b7f](https://github.com/dcache/dcache/commit/7871b7f2f5565ffcae20dc75172f0e64cd6f6db8)
:   [maven-release-plugin] prepare release 4.0.43

[4b71475](https://github.com/dcache/dcache/commit/4b71475e85b5952d79575ed44bb09c222ff93d08)
:   resilience: update state on pool operations when restarted from admin command

[19655eb](https://github.com/dcache/dcache/commit/19655eb01b7f3acdf737e7b20874a3ff31dbbe84)
:   chimera-shell: fix class cast of extractor in constructor

[f176365](https://github.com/dcache/dcache/commit/f176365b4f8f58ba4547082732f14a4b0d2e93bb)
:   libs: update jetty version to 9.4.12.v20180830

[bc1e5a2](https://github.com/dcache/dcache/commit/bc1e5a29d9def45563c4682d3515c877de61c359)
:   resilience: do simple existence check of replica on pool to avoid dark removes

[dd7c5b6](https://github.com/dcache/dcache/commit/dd7c5b640a0856d8ec79459f09e1af0867a6c612)
:   [maven-release-plugin] prepare for next development iteration

[c6471c1](https://github.com/dcache/dcache/commit/c6471c1dc67911698ff28e8a184230805e1fbb3e)
:   resilience: add ability to log resilience activity (incoming)

[68e36e1](https://github.com/dcache/dcache/commit/68e36e1a3b78f2efc57348ff8c912b537178c82a)
:   resilience: add ability to log resilience activity

## Release 4.0.42

### webdav

The current release fixed resource name for door root error.


### Changelog 4.0.41..4.0.42

<!-- git log 4.0.41..4.0.42 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[144c899](https://github.com/dcache/dcache/commit/144c8996b9aefff5c362d0270b5308c817eb4474)
:   [maven-release-plugin] prepare release 4.0.42

[6703656](https://github.com/dcache/dcache/commit/67036563cde9cc7fe5a651744e415d117dc401f9)
:   webdav: fix resource name for door root

[029f28a](https://github.com/dcache/dcache/commit/029f28aa2a6c99b7d0da5f4c862a45a09b6730dd)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.41

### ftp

Now clients can request the checksum value of a file not owned by that
user and where dCache does not already know the checksum value.

### pool

The current release fixed some logging on the pool where messages were recorded against an
arbitrary context (i.e., the bit in square brackets), resulting in
misleading information. 


### Changelog 4.0.40..4.0.41

<!-- git log 4.0.40..4.0.41 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[63f22d4](https://github.com/dcache/dcache/commit/63f22d46e83dffd75546edec3560ee9c7540d6a4)
:   [maven-release-plugin] prepare release 4.0.41

[adb82a6](https://github.com/dcache/dcache/commit/adb82a61a9cd07405b6826a7bb30cdaa74b9ca09)
:   pool: fix CDC for repository listener notification

[ab22edd](https://github.com/dcache/dcache/commit/ab22eddc73f92bbe7ff9126d24964763c2a357e7)
:   ftp: store calculated checksum using root privileges

[7a1241a](https://github.com/dcache/dcache/commit/7a1241a410abf8c22d7e3acb10933a0f979b03f6)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.40

### webdav

When users request a macaroon via an HTTP POST request targeting
a specific path, a caveat is created that restricts the macaroon
to that path (requests to / result in a non-limited macaroon). 

Commit 99c726e3 resulted in users getting back a non-limited
macaroon for every request. This issue was fixed with this
release.


### Changelog 4.0.39..4.0.40

<!-- git log 4.0.39..4.0.40 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[a7d821186e](https://github.com/dcache/dcache/commit/a7d821186e5c17d5aeff5db8178c50a8bd45a575)
:   [maven-release-plugin] prepare release 4.0.40

[eae47330f3](https://github.com/dcache/dcache/commit/eae47330f3233b7a46f2bcefe356ec0ce7cb94e9)
:   systemtest: fix OpenSSL DN format change

[6022036556](https://github.com/dcache/dcache/commit/6022036556ae6b117cabac07303090701991ccf4)
:   webdav: fix path-to-caveat for macaroon minting endpoint

[e1f5f5ea04](https://github.com/dcache/dcache/commit/e1f5f5ea04b9f4d852e122d32c4c75ac1d0d15d1)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.39

### alarms

Pool errors involving a fatal repository fault, for
instance, can be sent now  as an email alarm without
having to send all pool disabled alarms.

### gplazma

The JAAS gplazma plugin no longer logs a stacktrace on bad configuration.

### pool

The current release improved error messages  making them clearer by avoid using the same error message in multiple places. 

### srm

A stack-traces fixed  for  concurrent updates in pin-manager and similar
(expected) failures.

### transfermanager

Now Third-party transfers fail if the client is requesting to copy a file
from dCache that has not fully been uploaded.

### webdav

Disabling basic authn should not now disable macaroons. The current release fixed  `webdav.authn.basic` and `frontend.authn.basic` so that setting
these configuration properties to `false` no longer blocks macaroons from being accepted in the HTTP Authorization header.

The current release impoved error messaging  for unauthenticated request. 

IllegalArgumentException exception is fixed now and attempts by a client to copy a file that has not fully been uploaded 
results in a clear error response.


### Changelog 4.0.38..4.0.39

<!-- git log 4.0.38..4.0.39 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[6130d2b](https://github.com/dcache/dcache/commit/6130d2b6d5e99556eb5691c3436368b098069173)
:   [maven-release-plugin] prepare release 4.0.39

[47a0806](https://github.com/dcache/dcache/commit/47a080616d4490a325d0a8ebbb74f1664247ad38)
:   webdav/frontend: disabling basic authn should not disable macaroons

[796ae0b](https://github.com/dcache/dcache/commit/796ae0b73faf96a8a83eb2341eb640e54d928414)
:   srm: do not log a stack-trace on expected Exception errors

[cf4dada](https://github.com/dcache/dcache/commit/cf4dadaf9737be46517a9a40ebe23f6d9ef7a802)
:   transfermanager: fail third-party copy if the file is still being uploaded

[cfae242](https://github.com/dcache/dcache/commit/cfae242b17658c3cef9b8988d29e40b858e33c28)
:   webdav: fail COPY early if file is currently being uploaded

[65791b3](https://github.com/dcache/dcache/commit/65791b3dd3161961c51b9b61c1ed38226f3f8178)
:   transfermanager: abort transfer if there is a bug

[7e91526](https://github.com/dcache/dcache/commit/7e9152681ae01904d25289a93fbea64c16c5c117)
:   gplazma: JAAS plugin logs a stack-trace on misconfiguration

[5969503](https://github.com/dcache/dcache/commit/59695038aba4e065115d10d1fceaccd76354bb5c)
:   pool: avoid using the same error message in multiple places

[7627e34](https://github.com/dcache/dcache/commit/7627e348b9ba38fc901fbb85691063df0d2fbd3a)
:   alarms: add pool dead alarm

[9bfef0b](https://github.com/dcache/dcache/commit/9bfef0b6eaab28f57fc9c0001f97a7e06cf861b1)
:   [maven-release-plugin] prepare for next development iteration

[d3864b2](https://github.com/dcache/dcache/commit/d3864b2e6cd538c748e5445375d53fef22153fae)
:   pool: don't update atime on flush

[8ee187f](https://github.com/dcache/dcache/commit/8ee187f305d598b4a1bd3917d7839f23d2fb2461)
:   scripts: fix 'dcache pool yaml' command

[fc2b228](https://github.com/dcache/dcache/commit/fc2b228a13a1c8cd63a70967bed5a784b755b5c8)
:   webdav: 401 for unauthenticated requests; message in status line

## Release 4.0.38

### ftp

The current release fixed MLSC command for non-small directories and Globus is now able to list directories with > 100 directories.


### Changelog 4.0.37..4.0.38

<!-- git log 4.0.37..4.0.38 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[95552ec](https://github.com/dcache/dcache/commit/95552ec584a82acfb8aff0ff263894ee666dbe9a)
:   [maven-release-plugin] prepare release 4.0.38

[dd51676](https://github.com/dcache/dcache/commit/dd51676480cb2c8a990d02c65885bbaf2d400e44)
:   ftp: fix MLSC command for non-small directories

[06df72a](https://github.com/dcache/dcache/commit/06df72a97e89cf8a065b62f02e59d97d3c2a7d2f)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.37

### billing

Database connection loss now is reported for billing.

### webdav

The current release fixed the problem where all but one requests fail, if multiple concurrent PUT requests have directories in the path that do not already exist. 


### Changelog 4.0.36..4.0.37

<!-- git log 4.0.36..4.0.37 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[78f3f48](https://github.com/dcache/dcache/commit/78f3f486b252ffadd6ed21de4dc82554b91e8712)
:   [maven-release-plugin] prepare release 4.0.37

[dd446d5](https://github.com/dcache/dcache/commit/dd446d529429fc61878e9186695c4f9df71262b9)
:   dcache: wrap billing data source with AlarmEnabledDataSource

[6f1e59c](https://github.com/dcache/dcache/commit/6f1e59c5c9d2357868850d6ff339a2fc691f2d0a)
:   common: fix random data generation in TimeseriesHistogram unit test

[2cc139b](https://github.com/dcache/dcache/commit/2cc139ba5a22cd835a5a5dd6a7b37120775be175)
:   webdav: work-around Milton racy API for creating collections

[93ae769](https://github.com/dcache/dcache/commit/93ae769fbee32ab439b340be2ba0cf5bfe88abba)
:   webdav: fix name of root

[d1931d6](https://github.com/dcache/dcache/commit/d1931d633123952161f5fbe4764afb3cc897fd27)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.36

### gplazma

Since update to newer BC and voms-java-api libraries
sites report VOMS certificate validation errors like
This is now fixed.

### srm

The `dcache ports` command now includes the srm's TLS/SSL interface.


### Changelog 4.0.35..4.0.36

<!-- git log 4.0.35..4.0.36 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[38c75f5](https://github.com/dcache/dcache/commit/38c75f53a8b5c0bf4f6df77964ac59b1b959e3cc)
:   [maven-release-plugin] prepare release 4.0.36

[e2928ad](https://github.com/dcache/dcache/commit/e2928ad8443e4a921b719e77acdf27d9d8ca5ca9)
:   gplazma voms plugin: add trust anchor refresh paramater

[1001dd6](https://github.com/dcache/dcache/commit/1001dd61a690dc319514c30433dc624539cb690b)
:   srm: include TLS/SSL port in 'dcache ports' command

[790ca89](https://github.com/dcache/dcache/commit/790ca89f472d55d31a18e2f8b3ab82e614bc718c)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.35

### Changes affecting multiple services

The current release corrected the properties for access-log.


### Changelog 4.0.34..4.0.35

<!-- git log 4.0.34..4.0.35 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[173b6a1](https://github.com/dcache/dcache/commit/173b6a18227ceb7d6265270143cf0b715a774f53)
:   [maven-release-plugin] prepare release 4.0.35

[b83c282](https://github.com/dcache/dcache/commit/b83c2824eb3685751770bbf752d7b3600863230b)
:   correct the properties for access-log

[4c8281b](https://github.com/dcache/dcache/commit/4c8281be282c5c9f7c4eeed960bc54bcfce59f1e)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.34

### Changes affecting multiple services

If a client specifies a checksum value with either a WebDAV or FTP upload,
a `Restriction check by-passed due to missing path` warning was logged occasionally.
This was fixed now, ensuring that restrictions are always applied.

### pool

Space reservations on pools that are connected to tape showed a problem with 
failing restore requests: If a restore failed, the space that was reserved to
hold the file that was supposed to come in from tape was not freed again but
kept in the 'sticky' state. This resulted in lots of unusable space on pools
that could only be reclaimed through a restart. 

With the current release, this issue is fixed and space is freed as soon
as possible after a failed restore request.

### resilience

A very rare race-condition is fixed where a failed upload results in
resilience recording a stack-trace.

### webdav

An issue with the Milton WebDAV library prevented Partial (or vector-read) GET requests
from succeeding. This was fixed now through both an update of the dependency and a local
patch while we wait for the proposed fix to be included upstream.


### Changelog 4.0.33..4.0.34

<!-- git log 4.0.33..4.0.34 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[0488d2dc37](https://github.com/dcache/dcache/commit/0488d2dc374fc232209cf1dfdd4746d9742269b7)
:   [maven-release-plugin] prepare release 4.0.34

[164b539921](https://github.com/dcache/dcache/commit/164b539921f03e724191210d3c18d800dc1f1394)
:   webdav: fix proxied partial (vector-read) GET requests

[e7dc702f29](https://github.com/dcache/dcache/commit/e7dc702f2922bbdfbce259c05b587802f9de70bb)
:   pool: fix pool space accounting on failed restores

[ccbfedab7d](https://github.com/dcache/dcache/commit/ccbfedab7d39a06815c0e65d4fd1d0203dc71a19)
:   resilience: fix NPE if file unlinked when resilience processes a broken file

[307d443951](https://github.com/dcache/dcache/commit/307d443951b39661f8189058f5f590635bcc0ffa)
:   ftp/webdav: fix bypass of restrictions

[e426e1667b](https://github.com/dcache/dcache/commit/e426e1667bbfdc5da3688af48e5e4d9b4846f071)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.33

### alarms

An internal issue with the alarms configuration was fixed, which
should prevent a rare NullPointerException from occuring.

### dcap

Creating a file or directory using the DCAP protocol with a URL
as parameter, the file permissions were not set correctly. 

With the current release, this was corrected, and such files
use the client-supplied file permissions. If none are provided,
the default modes 0700 (for directories) and 0600 (for files)
are used. 

### xrootd

An uncaught exception in xrootd doors was fixed.


### Changelog 4.0.32..4.0.33

<!-- git log 4.0.32..4.0.33 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[62657c3f71](https://github.com/dcache/dcache/commit/62657c3f71b8432e127b5967a8b5d36cb63d43ac)
:   [maven-release-plugin] prepare release 4.0.33

[cb1020343e](https://github.com/dcache/dcache/commit/cb1020343e7001ecfaf6ffdd07336384df6803cc)
:   alarms: fix persistence.xml configuration

[6423f196ea](https://github.com/dcache/dcache/commit/6423f196ea3a3873f020a845af3dc85f79b5b1ea)
:   dcap: fix permission propagation with DCAP

[8c2e8da647](https://github.com/dcache/dcache/commit/8c2e8da6472afa3f1a47283811a4a20459aa319b)
:   dcache-xrootd: handle possible race condition in directory listing

[8b772286f2](https://github.com/dcache/dcache/commit/8b772286f2507d42bef4dd63314bd0c472f2736c)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.32

### statistics

Metadata merge was using  max when it should had used min, this is now fixed.


### Changelog 4.0.31..4.0.32

<!-- git log 4.0.31..4.0.32 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[53c9888](https://github.com/dcache/dcache/commit/53c98881232ad480bbe0e3a711f1b95b40e098a2)
:   [maven-release-plugin] prepare release 4.0.32

[cf06159](https://github.com/dcache/dcache/commit/cf06159cce42a3ba8b0ad252bf62ca7349246613)
:   common: fix histogram metadata merge

[6574f09](https://github.com/dcache/dcache/commit/6574f0935051b131869cdcd90534def4c5d6a28b)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.31

### ftp

The current release provides better protection against leaking proxy/data TCP sockets if client
aborts a proxied transfer.



### srm

Clients that use the gridsite protocol, such as davix, can now delegate
their credential.


### Changelog 4.0.30..4.0.31

<!-- git log 4.0.30..4.0.31 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[4172208](https://github.com/dcache/dcache/commit/4172208b00031c8e7f8936c10db5fb450a9a03ec)
:   [maven-release-plugin] prepare release 4.0.31

[3b060dd](https://github.com/dcache/dcache/commit/3b060dd01d1c982b8771c5fb0b394c257e060c90)
:   ftp: make shutdown more robust

[30ae5dd](https://github.com/dcache/dcache/commit/30ae5ddac5b1490346e272db3e52ca43b7c83a0a)
:   common: fix bug in CountingHistogram index computation

[ccef077](https://github.com/dcache/dcache/commit/ccef077d1e8ac1c431a4a38cb52397ca0a67e791)
:   [maven-release-plugin] prepare for next development iteration

[a87fa21](https://github.com/dcache/dcache/commit/a87fa21ad3ce586d96f5735ef299aea0ba4df8bb)
:   srm: gridsite fix querying validity of delegated credential

## Release 4.0.30

### ftp

The performance markers that dCache sends back to the client in FTP transfers
are now more robust against bugs.

### nfs

When transient errors in pools cause NFS transfers to have to wait and retry,
the system's behaviour is now more robust and no StackOverflowErrors should be logged any more.

### scripts

Maven's findbugs plugin is now granted more working memory in order
to make builds, especially on our continuous integration system, 
more robust.

### srm

Certificate lifetime considerations for VOMS proxy certificates are
improved in this release: if a
client delegates a credential where the VOMS AC expires before the X.509
proxies, dCache now will not use the credential beyond the AC expiry time. 
This avoids unnecessary authentication errors. 

### webdav

When the WebDAV door is considering an HTTP third-party-copy request
that uses grid-site delegation, there is a minimum 20 minute validity
that any existing delegated credential must satisfy. If this is not
satisfied then dCache will request a fresh delegated credential.

Until now, if the client failed to delegate a fresh certificate then the
subsequent COPY request was rejected. This release changes that behaviour
and enables such transfers.


### Changelog 4.0.29..4.0.30

<!-- git log 4.0.29..4.0.30 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[7cd371066d](https://github.com/dcache/dcache/commit/7cd371066dc697073bb4dc649ccd0272d71f4d85)
:   [maven-release-plugin] prepare release 4.0.30

[37a7212a0d](https://github.com/dcache/dcache/commit/37a7212a0d6a03bd095ce34f75296adbd2ea26b9)
:   scripts: Avoid findbugs memory errors

[a619fa8c93](https://github.com/dcache/dcache/commit/a619fa8c93c2068600f6b658e877ace2671c9123)
:   nfs: increase request retry delay when selecting/starting  pool or mover

[b5371e9fae](https://github.com/dcache/dcache/commit/b5371e9faec6cdf4272cc79284255e509320eaa0)
:   webdav: adjust minimum validity after requesting delegation

[7ff0b933bc](https://github.com/dcache/dcache/commit/7ff0b933bc4910b29624dfcb1e07d5cede1d89ca)
:   srmmanager/webdav: consider VOMS AC validity of delegated credential

[f226a8503b](https://github.com/dcache/dcache/commit/f226a8503b198a1e475c3e799438e00a35a7da14)
:   ftp: make performance marker task robust.

[0f14230923](https://github.com/dcache/dcache/commit/0f142309239f69877d144630fbb66038595c9ef5)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.29

### pool

Diagnostic logging for failed HTTP third-party transfers was improved.

Billing records for failed transfers now show more detailed information.

The handling of cancelled flush requests for nearline media
was rewritten to be more efficient. This resolves issues where pools
report "Flush of 0000... failed with: CacheException" followed by
"Pool restart required: Internal repository error".

Compatibility with DPM was improved by increasing HTTP GET requests' timeouts.
This should allow more transfers to succeed.

### poolmanager

Supplying poolmanager with an unresolvable hostname as the target will
now result in an UnknownHostException instead of the previous behaviour
where an (unnecessary) NullPointerException was thrown.

### srm

Logging of errors in the SRM credential store was improved.

### webdav

If a non-resolvable host name is given as the source or destination
of a third-party copy request, WebDAV will now fail the transfer
immediately instead of waiting for a Poolmanager timeout.

Diagnostic logging for failed HTTP third-party transfers was improved.

### xrootd

dCache allows xrootd clients to specify a query/opaque string in a
kXR_mv request's source path.


### Changelog 4.0.28..4.0.29

<!-- git log 4.0.28..4.0.29 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[14ee345617](https://github.com/dcache/dcache/commit/14ee3456175c6e0c1474d68aa0580431d119822c)
:   [maven-release-plugin] prepare release 4.0.29

[e7f1b255c1](https://github.com/dcache/dcache/commit/e7f1b255c114cdbdc21d228b4ea462a6f5aee9ea)
:   pool: HTTP TPC rework exception logging

[90e0a66e0b](https://github.com/dcache/dcache/commit/90e0a66e0b005e615f3d5f4e4ee431b312bcec6c)
:   pool: increase TPC socket timeout for GET requests

[a5d3b52cf8](https://github.com/dcache/dcache/commit/a5d3b52cf8a3075d43b0071039946912cf1a4cec)
:   srm: fix credential store logging

[46650bca9d](https://github.com/dcache/dcache/commit/46650bca9d98aa40ccc91d3f28f18d2dffc820fa)
:   pool: update log status using exception class name if no message

[fe91d5e0ea](https://github.com/dcache/dcache/commit/fe91d5e0ead91282f41843dfdd889196b2133374)
:   xrootd: strip off query part from kXR_mv source

[53f015e9a1](https://github.com/dcache/dcache/commit/53f015e9a14dab00fa8275a27ad5137905d5a967)
:   webdav: fail TPC request early on unknown hostname

[6bbd2be1e0](https://github.com/dcache/dcache/commit/6bbd2be1e0fa2100ba3b0d5f0d5472ffcf61f06f)
:   nearline-provider: do not propagate thread interrupt flag

[e5ba64481a](https://github.com/dcache/dcache/commit/e5ba64481a4da2c818cf76ae1ae2a1454011e980)
:   poolmanager: fix NPE on unknown host

[5268bd3785](https://github.com/dcache/dcache/commit/5268bd37851784c2fff7893255a145e9dee0c1b3)
:   webdav: improve logging of TPC requests

[1c22d720e2](https://github.com/dcache/dcache/commit/1c22d720e2754d3e09ec9bc68d7f586dbe056b44)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.28

### Changes affecting multiple services

In order to more easily identify a rejected macaroon in the logs, its ID is now included in the log message.

An irrelevant stacktrace was logged on unexpected CacheExceptions. This 
was removed, leading to less clutter in the logs.

Different macaroons that were issued against the same secret are now discernible in the logs.

Users now get more information about the reasons why an invalid macaroon was
rejected: HTTP requests that are made with an invalid macaroon have a 401 HTTP
response with the status-line explanation phrase that describes why the
macaroon is invalid.

The access log file also logs why a macaroon was rejected.

### core

A library dependency was updated to avoid [CVE-2018-11771](https://nvd.nist.gov/vuln/detail/CVE-2018-11771). This patch introduces no user-visible changes.

### gplazma

Invalid macaroon logins no longer "spam" gPlazma.

### pnfsmanager

When creating a macaroon to allow uploading of data, the desired path
may not already exist. Without restrictions, WebDAV will auto-create
parent directory items that are missing, or the client can create these
directory elements explicitly with MKCOL.

With restrictions (such as from a macaroon) such directory creation
currently requires the MANAGE activity, which allows other actions
beyond the scope of this scenario. With this release, the behaviour 
was changed so that a user with a macaroon that authorises them to upload data into a
particular directory will be able to create parent directories to
achieve uploading the data.

### pool

A regression caused pools that had their size only specified in a layout file
to report a size of 8 Exabytes. This issue was fixed.

dCache now supports a DPM-specific HTTP extension that indicates the
checksum calculation is not yet complete, avoiding potential data
corruption with third-party copies: If DPM is calculating a checksum, then any RFC 3230 (i.e., with a
'Want-Digest' header) GET or HEAD request returns '202 Accepted' respond
status line and an HTML page as the response entity. Since dCache
considers any 2xx response as success, the HTML page was previously accepted as the
file's contents, resulting in data corruption.

dCache pools no longer log a stack-trace for non-bug P2P failures.

### srm

The domain '.access' log file now contains log information for grid-site
delegation activity, which facilitates debugging of http third-party-copying issues.

### transfermanagers

The "restriction check by-passed" warning for each WebDAV-initiated
third-party transfer is fixed.

### webdav

A user may request a macaroon by making an HTTP POST request to the
WebDAV door. This log entry was augmented by the ID and type of
macaroon used.

A previous patch needed a bit of an update to ensure that X.509-with-FQAN authenticated third-party transfers with macaroons work under all circumstances. This is now ensured.

### xrootd

The `--zip` option of xrootd clients is now supported.


### Changelog 4.0.27..4.0.28

<!-- git log 4.0.27..4.0.28 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[3bf021ba1e](https://github.com/dcache/dcache/commit/3bf021ba1ede8edf69031fdf5f7328a0f760b5a3)
:   [maven-release-plugin] prepare release 4.0.28

[d46ba16630](https://github.com/dcache/dcache/commit/d46ba166303ee90bd596643b1d9f1180b3486fd1)
:   xrootd: add support for kXR_stat on open files

[27c9a340ac](https://github.com/dcache/dcache/commit/27c9a340ac65c8a1b732cd48005ae3853187069d)
:   pool: P2P failures trigger stack-trace

[545d5b6fa4](https://github.com/dcache/dcache/commit/545d5b6fa41bc8c2d2b542de431b5d0da15c722b)
:   webdav: obtain FQAN from X.509 credential for gridsite

[a586818c11](https://github.com/dcache/dcache/commit/a586818c1163a0da0a77aba8009b06c896627008)
:   core: avoid sending bad macaroons to gplazma

[5e929b214e](https://github.com/dcache/dcache/commit/5e929b214e327c55b6d2809bfababc0943ae0bed)
:   webdav: update access log to record macaroon request details

[a9341e53a5](https://github.com/dcache/dcache/commit/a9341e53a5bcacdbec242686414f7312ca2d1146)
:   transfermanager: fix missing path

[c0399321e5](https://github.com/dcache/dcache/commit/c0399321e578a25a3b080098ecef7e1d757ad0ed)
:   libs: update to commons-compress-1.18

[155e4a994f](https://github.com/dcache/dcache/commit/155e4a994f63e060ab5d6f588957d00c832e9238)
:   macaroons: include macaroon id in error message

[a32b8e4615](https://github.com/dcache/dcache/commit/a32b8e46156307b3faef1ba3cbb477f817bc7a63)
:   pool: fix pool's runtime configured size regression (b70b0d9)

[218baaf895](https://github.com/dcache/dcache/commit/218baaf89536f97c46b6612ee6ff418114c7202c)
:   core: provide better feedback and logging if a macaroon is rejected

[53f5d50733](https://github.com/dcache/dcache/commit/53f5d507336451412079fd72447ef1fb24942594)
:   pool: update HTTP TPC to support retrying GET and HEAD requests for DPM

[780729397a](https://github.com/dcache/dcache/commit/780729397a21ed39a84ce2de7075298dc2da2d0f)
:   srm: add gridsite delegation interface access-log

[cccc2840cb](https://github.com/dcache/dcache/commit/cccc2840cb582b1c64ac7008bb61e0d0be24a645)
:   macaroons: fix logged id

[f489eabbca](https://github.com/dcache/dcache/commit/f489eabbca1da0cf857fcb7f86a9cfd70db9eee7)
:   core: avoid stacktrace on arbitrary CacheException

[c78c707209](https://github.com/dcache/dcache/commit/c78c707209a6a9b2e70ef516cf185d79ec8618af)
:   [maven-release-plugin] prepare for next development iteration

[f1dae40568](https://github.com/dcache/dcache/commit/f1dae40568a290c16507094e40b50e2bab361f1b)
:   pnfsmanager: allow restricted user with UPLOAD to create parent directories

## Release 4.0.27

### poolmanager

This release increases responsiveness for users that are not allowed to stage files, and for NFS users who access offline files. 
In cases where such a user issued a read request at the same time that Pool Manager handled
a staging request, the first request would block for the duration of the staging -- potentially
quite a while. From now on, users that are not allowed to stage receive appropriate error
messages as soon as possible, without having to wait for anyone else.

### xrootd

Support for xrootd `mkdir` was improved. 


### Changelog 4.0.26..4.0.27

<!-- git log 4.0.26..4.0.27 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[1663c9b03f](https://github.com/dcache/dcache/commit/1663c9b03f5b8a001bf7f3a2cb3931c2bc60dd6c)
:   [maven-release-plugin] prepare release 4.0.27

[c462f71ec9](https://github.com/dcache/dcache/commit/c462f71ec9908bd2c80aaa74914a3356d68549f9)
:   xrootd: update to xrootd4j dependency to 3.2.3

[185a3309e4](https://github.com/dcache/dcache/commit/185a3309e42fbd18b02d6db219950e1fd2e3c32b)
:   poolmanager: do not squash request if state is not allowed

[a06303a09b](https://github.com/dcache/dcache/commit/a06303a09b3c8e018b2d7d4f841aa12867ab415b)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.26

### sysytemd

Systemd did  not inherite the system-wide limits and was  completely ignoring  `/etc/security/limits.d/92-dcache.conf`.
This is now fixed and the limits successfully loaded and enabled as expected.

### vehicles

The current release has fixed serialization regression in `FileCorruptedCacheException`.

### Changelog 4.0.25..4.0.26

<!-- git log 4.0.25..4.0.26 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[1ac0254](https://github.com/dcache/dcache/commit/1ac02542d688b87586a88bc8ae7af5aa4d2219dd)
:   [maven-release-plugin] prepare release 4.0.26

[e586e55](https://github.com/dcache/dcache/commit/e586e55a4a4f1f3d6619268f97e2722c58f03495)
:   vehicles: fix serialization regression  in  FileCorruptedCacheException

[f9bb407](https://github.com/dcache/dcache/commit/f9bb40786842cb21e8e3310580a4bb242edda1a8)
:   [maven-release-plugin] prepare for next development iteration

[22b1b4b](https://github.com/dcache/dcache/commit/22b1b4bd2288b551b98779c7c98a683f580e9053)
:   systemd: Add `/etc/security/limits.d/92-dcache.conf` in the dcache systemd unit and generator.

## Release 4.0.25

### Changes affecting multiple services

This rlease fixes an issue with WebDAV 3rd-party-copy requests that are
authorized using a macaroon that is only valid for writing a specific file.

NOTE: both the webdav door and transfermanagers must be updated before
the fix is effective. 

### pool

In order to help with debugging issues with partial FTP transfers, 
dCache pools now are able to log considerable information about failed FTP
transfers. 

This is controlled by the new property `pool.mover.ftp.enable.log-aborted-transfers`.

### webdav

dCache can now transfer data with a remote site, authenticating with
that remote site using a delegated X.509 credential, but authenticating
locally with a macaroon.

### xrootd

This release updates xrootd4j, which should help fix occasional "pad block corrupted" issues with older clients.


### Changelog 4.0.24..4.0.25

<!-- git log 4.0.24..4.0.25 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[48c07f240b](https://github.com/dcache/dcache/commit/48c07f240be115936d86b07b2ff7540069c8845a)
:   [maven-release-plugin] prepare release 4.0.25

[290f74b701](https://github.com/dcache/dcache/commit/290f74b70110c16091798ef0de4b00a532eead14)
:   pom.xml:  update xrootd4j dependency to 3.2.3

[cafc1ed327](https://github.com/dcache/dcache/commit/cafc1ed3277bb8f63724bf8fd3cf13f410fcacf4)
:   webdav: use TLS credential directly for gridsite

[abe9a39d34](https://github.com/dcache/dcache/commit/abe9a39d3403f5502d96dca3def0928d2e5702b8)
:   pool: instrument ftp mover to show partial transfers

[d797026a5f](https://github.com/dcache/dcache/commit/d797026a5fc277ca977f184a2b42407fc97991cb)
:   webdav+transfermanagers: support TPC pull with targeted macaroons

[e2b1af7319](https://github.com/dcache/dcache/commit/e2b1af7319d585d303f52825918aefb6311c672a)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.24

### frontend

The current release fixed broken directory QoS reporting and now frontend now more accurately describes the QoS of directories; i.e., the
QoS that newly written files will receive when written into this
directory, assuming none of the targeted pools are volatile.

### webdav

the macaroon creation with multiple path restrictions failed with a http error 500 and the error message.
 This is now fixed and the macaroon creation succeeds when multiple path restrictions are defined.

The current release improved  error handling for PROPFIND request.


### Changelog 4.0.23..4.0.24

<!-- git log 4.0.23..4.0.24 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[1c28c0f](https://github.com/dcache/dcache/commit/1c28c0fbab4ff2a3ce9e92c898f2e734c65802c4)
:   [maven-release-plugin] prepare release 4.0.24

[e98ada9](https://github.com/dcache/dcache/commit/e98ada9a2ddfa0a7971ed7372419fdffc237c396)
:   frontend: fix broken directory qos reporting

[49e4bf9](https://github.com/dcache/dcache/commit/49e4bf9e6fe58229194538313c45108753d7f74d)
:   webdav: avoid throwing any exception when listing a directory for PROPFIND

[ca73622](https://github.com/dcache/dcache/commit/ca736220e0a50c10ca6a1e75d3f63fd85736fba9)
:   webdav/macaroon: Fix macaroon creation with multiple path restrictions.

[a84d53f](https://github.com/dcache/dcache/commit/a84d53f417ac40a1e3580c42db92c5708aae5f97)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.23

### ftp

dCache now has the ability to log the current status of a transfer at the point the client decided to abort an FTP transfer. 
This should support a post mortem investigation on why a transfer was cancelled.

### nfs

With the current release the timeout of pnfshandler is configurable and nfs door quicker
 recovers from situations, when a PnfsManager is not available.


### Changelog 4.0.22..4.0.23

<!-- git log 4.0.22..4.0.23 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[f0a1bc1](https://github.com/dcache/dcache/commit/f0a1bc18b2e56360e5d14eb742731fd6ae08e8d9)
:   [maven-release-plugin] prepare release 4.0.23

[2a6a8af](https://github.com/dcache/dcache/commit/2a6a8afa0b20fddd8661fe38a67d059754e720cb)
:   ftp: add ability to log client-aborted transfers

[c319b03](https://github.com/dcache/dcache/commit/c319b03262b00449818393c89e7d73e7fdaf78b4)
:   nfs: make timeout of pnfshandler configurable

[4501e58](https://github.com/dcache/dcache/commit/4501e58f5464ba0d0f7b879d88aa4651155d2282)
:   dcache: release dcache-view version 1.3.3

[03f1f5c](https://github.com/dcache/dcache/commit/03f1f5cef84cfa4ae23fe6bb887febe8531b7f99)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.22

### NFS

When two clients A and B operate on a file in quick succession, A opening the
file and B deleting it before LAYOUTGET is called, dCache puts the 
transfer into the list of active transfers and returned NFS4ERR_NOENT. If a
client tries to optimize the corresponding CLOSE call away, as some do, 
the entries are never removed from the list, effectively creating a leak.

This problem was fixed. Clients now receive an NFS4ERR_STALE message in those
cases.

### core

Certain transfer failures, such as attempting to
use a space-reservation that has insufficient capacity, resulted in the
door eventually reporting a time-out problem to the client.

A typical error message would resemble

```Request to [>SpaceManager@local ... ] timed out.```

This problem was traced to an internal misconfiguration of a messaging
component and is fixed from this release onwards.

### frontend

The reporting of a file's QoS status in frontend was improved. Files
that are being scheduled for moving to tape are now reported as 
'tape' instead of 'disk'.

### pool

A bug was fixed that occasionally caused problems with the pools' 
Berkeley DB. This could, for example, be triggered by removing files
which were in a flush queue. 

A typical error message was, e.g.

```
27 Aug 2018 12:09:33 (cat2_lhcbtape) [Frontend-dcacheview PoolDataRequest] Fault occurred in repository: Internal repository error. Pool restart required: : CacheExcept
ion(rc=204;msg=Meta data lookup failed and a pool restart is required: (JE 7.3.7) Environment must be closed, caused by: com.sleepycat.je.ThreadInterruptedException: En
vironment invalid because of previous exception: (JE 7.3.7) /space/lhcb/tape/pool/meta java.lang.InterruptedException THREAD_INTERRUPTED: InterruptedException may cause
incorrect internal state, unable to continue. Environment is invalid and must be closed.)
27 Aug 2018 12:09:33 (cat2_lhcbtape) [Frontend-dcacheview PoolDataRequest] Pool mode changed to disabled(fetch,store,stage,p2p-client,p2p-server,dead): Pool restart req
uired: Internal repository error
```

### webdav

Web clients (such as web-browsers) make OPTIONS pre-flight requests to
discover what they are allowed to do, according to the CORS standard.

Unfortunately, some web-browsers make the OPTIONS request without
presenting any credentials. If the resource is within a protected
directory then dCache currently fails the OPTIONS request.

This release introduces a new behaviour where such requests will always
succeed, so that browser pre-flight requests are not hampered.


### Changelog 4.0.21..4.0.22

<!-- git log 4.0.21..4.0.22 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[70845920c2](https://github.com/dcache/dcache/commit/70845920c2d960b2dcdb3b9860ff494554b2e0ba)
:   [maven-release-plugin] prepare release 4.0.22

[744b85aecc](https://github.com/dcache/dcache/commit/744b85aeccc35dcabfef6cf83e99dfaba5551dc1)
:   nearline-provides: do not interrupt processing thread on cancel

[6114916a07](https://github.com/dcache/dcache/commit/6114916a07773c4e4f51e6d1499c915c9c03481c)
:   nfs41: invalidate open-state on layoutget if file is removed

[8b9706a3f1](https://github.com/dcache/dcache/commit/8b9706a3f1bffed3dceccf10c4de152607cfe059)
:   webdav: always respond to OPTIONS request

[1020c907e5](https://github.com/dcache/dcache/commit/1020c907e584e7dab4139da11762b9dcb046c93e)
:   core: ensure pool/poolmanager communication receives errors

[014507c39d](https://github.com/dcache/dcache/commit/014507c39db3e1488230c1bc91daf19b9ea8c660)
:   frontend: add targetQoS for not-yet-flushed tape files

[3c0761343d](https://github.com/dcache/dcache/commit/3c0761343de4d09a7bdba9afef17a8aafe85e37b)
:   [maven-release-plugin] prepare for next development iteration

[97f716c151](https://github.com/dcache/dcache/commit/97f716c1519e2d1dcb742a1c2a23146334658b15)
:   dcache: release dcache-view version 1.3.2

## Release 4.0.21

### gplazma

The OidcAuthPlugin  plugin was  updated so that users whos op does not claim
 `name`, and does not claim `given_name` nor
`family_name` can use dCache.

### pool

This release fixed  the log stack-trace for `queue` admin commands and now bad admin input for the following admin commands no longer results in a stack-trace being logged:

* queue activate
* queue activate class
* queue remove class
* queue suspend class
* queue resume class
* queue remove pnfsid

### poolmanager

 NPE is fixed when staging files back from tape and
`poolmanager.enable.cache-hit-message` is true.

### webdav

The current release updated   default credential delegation for third-party copy so that now requesting a third-party copy using a macaroon does not trigger a failed
attempt to OpenID-Connect delegation.


### Changelog 4.0.20..4.0.21

<!-- git log 4.0.20..4.0.21 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[107d922](https://github.com/dcache/dcache/commit/107d92294493a898771c152fac03cf2bd56f25a1)
:   [maven-release-plugin] prepare release 4.0.21

[e04ff3b](https://github.com/dcache/dcache/commit/e04ff3b87d0aec2a178e81cd8cf1c49c99d6e059)
:   poolmanager: fix NullPointerException when staging files and reporting hits

[f088229](https://github.com/dcache/dcache/commit/f08822977b153bc643f128e2b80d90699fba5198)
:   gplazma: oidc fix FullNamePrincipal creation

[de926dd](https://github.com/dcache/dcache/commit/de926dddbfdf497cd5b6b74a5751a0611fa6b776)
:   libs: update jetty to version 9.4.11

[df6040f](https://github.com/dcache/dcache/commit/df6040fda5158ce9b2e704f93d39d5e3d535d79d)
:   pool: 'queue' admin commands not the log stack-trace on bad arguments

[3725c41](https://github.com/dcache/dcache/commit/3725c41e2cc8322687575cbb24519a61431032f8)
:   webdav: update default credential delegation for third-party copy

[bd1e000](https://github.com/dcache/dcache/commit/bd1e0000f4360f7f3da227899335a7d21481ac25)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.20

### history

This release fixes a bug that could cause startup errors
in the history service in the face of network errors. 

### many

Remote pool monitor would occasionally log stack traces from exceptions  
when a domain shut down due to an interrupt. This has been fixed, reducing
the number of irrelevant log entries in such situations.


### Changelog 4.0.19..4.0.20

<!-- git log 4.0.19..4.0.20 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[7ad65f8310](https://github.com/dcache/dcache/commit/7ad65f831093ead9aca73296d5be7fd36bcf0a62)
:   [maven-release-plugin] prepare release 4.0.20

[e74c5b7484](https://github.com/dcache/dcache/commit/e74c5b748430f4ac50ff2da7f8b94defcc5f10d1)
:   dcache-history: handle Gson syntax errors explicitly

[eb7c3fc2fd](https://github.com/dcache/dcache/commit/eb7c3fc2fdddb1044c13a1ac9a560731bf7f1946)
:   cells: add handling of RemoteProxyFailureException nested InterruptedException to UncaughtException handler

[3b908b94aa](https://github.com/dcache/dcache/commit/3b908b94aacbb552c49e486c72da72e7b542fc8c)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.19

### nfs

dCache 4.0 and 3.2 now use nfs4j version 0.15.4, which includes bugfixes for rarely observed deadlocks
and incomplete directory listing over nfs.


### Changelog 4.0.18..4.0.19

<!-- git log 4.0.18..4.0.19 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[14dd7236a5](https://github.com/dcache/dcache/commit/14dd7236a53f7f4c67783856d004b982fd26afb3)
:   [maven-release-plugin] prepare release 4.0.19

[649f080b2a](https://github.com/dcache/dcache/commit/649f080b2a1d8a2b7bc972c0834143a18a066530)
:   pom: update nfs4j-0.15.4 bugfix version

[7a7482e0b6](https://github.com/dcache/dcache/commit/7a7482e0b64de27f0216bd5c3de9c90f3b54a943)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.18

### PNFS

### pool

HTTP responses now contain more meaningful messages along with the 
HTTP response codes, instead of only just showing stock messages
like "400 Bad request". 

### webdav

When the WebDAV door proxies a transfer and a transfer failure occurs, the
door previously always just reported "500 Internal Error". This reporting
is now improved, with any more detailed error messages from (possibly) 
other services taking precedence. For example, if a pool returns a 400 error code, 
thus complaining about the client's request, this code is reported instead, 
which should help with diagnosing the error's cause.


### Changelog 4.0.17..4.0.18

<!-- git log 4.0.17..4.0.18 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[c0bbdf1212](https://github.com/dcache/dcache/commit/c0bbdf121288a68f28f78e7d71b183b79fbfdb8c)
:   [maven-release-plugin] prepare release 4.0.18

[a60f4c4448](https://github.com/dcache/dcache/commit/a60f4c44480928a16620ae6f6eaa1a9f3388aa24)
:   webdav: pass on status message phrase to client

[81f0c6f7e4](https://github.com/dcache/dcache/commit/81f0c6f7e40b54ad44d9df089252ae4abc1d8605)
:   pool: update HTTP mover to report errors as HTTP status message phrase

[05aee17272](https://github.com/dcache/dcache/commit/05aee17272ab97814222908ac23365e3be9d3628)
:   pnfsmanager: fix digest name handling in `get file checksum` command

[ba593fd70a](https://github.com/dcache/dcache/commit/ba593fd70a460ec39fd5b42046cfeb7819b98fbf)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.17

### resilience

Resilience suffered from a bug that would lead to a NoSuchElementException when a pool name no longer 
mapped to a location known to the Resilience service. This issue has been fixed.

When multiple pools go offline it is possible that
all replicas for a given resilient file become unreadable.
If the file is not CUSTODIAL, and thus cannot be restored
from tape, the discovery of such a file during scanning
will generate an error in the 'history errors' listing,
in the resilience domain .resilience log, and will also
raise a general alarm concerning the pool.


There currently exists a command, 'inaccessible', which
generates a listing of the pnfsids on a given pool
which in the current state of dCache have no readable 
replicas.  However, this command takes a while to complete
(asynchronously), and the output is written to a file
which must be viewed by logging in.

This release introduces 'refering pool' information to the
error output so that grepping the resilience log for a given
pool becomes easier, and adds options to the command to check
further details.


### Changelog 4.0.16..4.0.17

<!-- git log 4.0.16..4.0.17 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[5e3fca2473](https://github.com/dcache/dcache/commit/5e3fca24733dae2d1c5b221b8a54ea710682e4fc)
:   [maven-release-plugin] prepare release 4.0.17

[437ac98f5a](https://github.com/dcache/dcache/commit/437ac98f5ad5264732540a922c8db03070cb67a3)
:   dcache-resilience: improve inaccessible file accounting

[f060954745](https://github.com/dcache/dcache/commit/f060954745866f150723897a3eec0d85e5abba67)
:   dcache-resilience: skip invalid cancel filters

[d36c17d6c9](https://github.com/dcache/dcache/commit/d36c17d6c9ac1fa75737ce0c906d81079e4052c3)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.16

### scripts

A regression in the `dcache pool convert` command was fixed; the command works again.

### scripts

The instructions that are printed out once `dcache pool convert`
completes successfully now correctly point to the 
property that needs to be updated, namely `pool.plugins.meta`.


### Changelog 4.0.15..4.0.16

<!-- git log 4.0.15..4.0.16 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[b602706c09](https://github.com/dcache/dcache/commit/b602706c0953d143f9a5d7110f82e68b9b10edb1)
:   [maven-release-plugin] prepare release 4.0.16

[c34830a7b3](https://github.com/dcache/dcache/commit/c34830a7b31cdf0285283cb1981f056299200380)
:   pool: fix 'dcache pool convert' command

[105b9df7b7](https://github.com/dcache/dcache/commit/105b9df7b78e71672e126eca62ba65d370b62240)
:   scripts: update reference to configuration property

[dbf3dc2f25](https://github.com/dcache/dcache/commit/dbf3dc2f2556a8ca25be5f20f5422f2f6b6d6c0b)
:   pool: fix metadata migration tool to use Path

[1b82ee43de](https://github.com/dcache/dcache/commit/1b82ee43dedaefb1197ffaa1c0e9b022760dd178)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.15

### pool

This release improves dCache's robustness against network errors: In case 
registering a file with PNFS manager fails due to a timeout, the request
is retried transparently. 


### Changelog 4.0.14..4.0.15

<!-- git log 4.0.14..4.0.15 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[d80652cb16](https://github.com/dcache/dcache/commit/d80652cb16d4bed4941abb2baa27bd2fcfdd7328)
:   [maven-release-plugin] prepare release 4.0.15

[40818ef57e](https://github.com/dcache/dcache/commit/40818ef57e6066f92c07cb2bda48ac263c954414)
:   vehicles: fail-fast on invalid path

[c821b17e26](https://github.com/dcache/dcache/commit/c821b17e26d80cecc6fe0c12f29729fe1f0f4250)
:   pool: retry request to pnfs manager if timed out

[fd3ac055bf](https://github.com/dcache/dcache/commit/fd3ac055bf528ee1bd69e391d488a47f127a520e)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.14

### door

The current release added  support for a door advertising multiple hostnames or IP addresses.
dCache doors can  now advertise multiple interfaces, including DNS aliases.

### webdav

Milton's OPTIONS handler was returning  a 404 error if an OPTIONS request
targets an entity that did not exist. This behavior deviated from
Apache httpd server and was resulting  in failed uploads for dcache-view.
The current release fixed.


### Changelog 4.0.13..4.0.14

<!-- git log 4.0.13..4.0.14 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[5561a75](https://github.com/dcache/dcache/commit/5561a75bb0646c225ce699140ab95bcd4f434c5e)
:   [maven-release-plugin] prepare release 4.0.14

[f9a8084](https://github.com/dcache/dcache/commit/f9a8084965c4fba754484991bb6bb703f45e041c)
:   gplazma.properties: hint to enable roles

[eec385b](https://github.com/dcache/dcache/commit/eec385b3938a85fa76f4a4f0b224da8044585f98)
:   doors: support advertising multiple addresses in LoginBroker

[07a1332](https://github.com/dcache/dcache/commit/07a133239e0cf43a3ddc5bcdbde6e6b12d93cb3b)
:   webdav: do not return 404 for OPTIONS request targeting absent entity

[e4c543d](https://github.com/dcache/dcache/commit/e4c543d75c1657582dfe26a68add9f9db4e4021e)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.13

### dcache-resilience

There was a small regression in the way resilience computes
the number of operations necessary to adjust copies when
a storage unit definition changes.

The current rellease fixed  computation of operation count when storage requirements change.

### ftp

In order to aid diagnosing problems when FTP response being lost, now dcache  logs failures to wrap/encrypt responses.

### webdav

The current release improved error handling for client authentication with OpenID-Connect.
 A more complete set of information is now logged if OIDC delegation fails,
supporting the ability to discover why the delegation failed.


### Changelog 4.0.12..4.0.13

<!-- git log 4.0.12..4.0.13 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[4a0a41b](https://github.com/dcache/dcache/commit/4a0a41b28fc4d60d8523b6ad05b8ae44b9abde1d)
:   [maven-release-plugin] prepare release 4.0.13

[5566df3](https://github.com/dcache/dcache/commit/5566df32342ae4f4a9996af3b94d21012cd86ace)
:   scripts: add support for parsing ZooKeeper transaction logs

[cd53a25](https://github.com/dcache/dcache/commit/cd53a2593985dd24a2e55add8aa687c45b606366)
:   ftp: log failures to wrap/encrypt responses

[57a2b50](https://github.com/dcache/dcache/commit/57a2b5061cd64cecf32e6db80cc04265c4e4c2e1)
:   dcache-resilience: fix computation of operation count when storage requirements change

[aaebfe4](https://github.com/dcache/dcache/commit/aaebfe4caf3828e0027674bc02e0f29b3fbcdd44)
:   webdav: log errors if OIDC delegation fails

[5e18652](https://github.com/dcache/dcache/commit/5e1865219d80a800bb25a65ae6661b3f497e18e7)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.12

### ftp

Error reporting in the FTP service has been improved: in some mixed IPv4 / IPv6 scenarios,
only unclear error messages were reported. 


### Changelog 4.0.11..4.0.12

<!-- git log 4.0.11..4.0.12 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[921fcf22cc](https://github.com/dcache/dcache/commit/921fcf22cc47d8c88201ae170bb49c5c318b9fca)
:   [maven-release-plugin] prepare release 4.0.12

[8d43f6b3b2](https://github.com/dcache/dcache/commit/8d43f6b3b28b346870a9026aba1dede721f5ccd1)
:   ftp: returned error is too vague for meaningful investigation

[2c70ac8c40](https://github.com/dcache/dcache/commit/2c70ac8c40d01d4b87a7773a93ec867bd4de47fa)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.11

### nfs

Situations, where selection process was incomplete could not  be manually recovered
When selection process incomplete, due to `PoolManager` restart, there was no way  to trigger a new selection.
The current release added  two new commands to `nfs door`:  `transfer retry` and `transfer forget`.  

The first command manually re-activates  existing transfer by re-trying selection process. 
The second one should be  used to  completely 'forget' the stale transfer and let client to trigger a fresh selection process.


### Changelog 4.0.10..4.0.11

<!-- git log 4.0.10..4.0.11 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[1fb57bc0](https://github.com/dcache/dcache/commit/1fb57bc005c1039106c074025b9c717a67bc7ad3)
:   [maven-release-plugin] prepare release 4.0.11

[2c55714](https://github.com/dcache/dcache/commit/2c5571451cc29dea7589b6cef4d1e3212cc0900a)
:   nfs: add commands to reactivate stale transfers

[f7b7fa2](https://github.com/dcache/dcache/commit/f7b7fa26c5f1316ff095acd3ed27686ce3af75fb)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.10

### gplazma

gplazma now supports a Fermilab-specific authorization data source in JSON format.

### pool

During active ftp transfers, connection problems would lead to the rather unhelpful error
message "451 General problem". This error reporting was refactored, so that diagnosis
of the cause is now greatly facilitated.

### poolmanager

A potential NullPointerException (that was not observed in real-world usage until now)
was fixed in Pool Manager.

### resilience

A correction to resilience's error handling results in no more reports on
non-resilient (but corrupted) files. 

### spacemanager

In order to facilitate debugging, Space Manager now logs link-group related content
in greater detail.


### Changelog 4.0.9..4.0.10

<!-- git log 4.0.9..4.0.10 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[f6a357ef9a](https://github.com/dcache/dcache/commit/f6a357ef9a2e3270b54b6a30c10c3ca3173533ba)
:   [maven-release-plugin] prepare release 4.0.10

[bd37b4e2ef](https://github.com/dcache/dcache/commit/bd37b4e2effe9f83c330c3760816e60f146dcc98)
:   poolmanager: fix migration command if named pool is removed

[c72a4f8912](https://github.com/dcache/dcache/commit/c72a4f8912d2a293bc4e805ae18c361a92fbd71a)
:   dcache-resilience: repair over-aggressive handling of broken file messages

[64f90b4c0e](https://github.com/dcache/dcache/commit/64f90b4c0ecd9599728fbb72b0dcfed272efee04)
:   pool: fix error message for failed active FTP transfers

[00edd07b93](https://github.com/dcache/dcache/commit/00edd07b936bc8c4e8c820039c14a978e7e4634b)
:   fix the project version in pom.xml

[ba6ecef630](https://github.com/dcache/dcache/commit/ba6ecef630faa1c531da7e999dfa9fa2067d1ef5)
:   gplazma-fermi: fix last modified check in junit test

[2e9f266807](https://github.com/dcache/dcache/commit/2e9f26680758032f4cf5eb0d4a34f2b06498daf0)
:   spacemanager: add remote pool monitor debug logging

[04836c16d7](https://github.com/dcache/dcache/commit/04836c16d7b61b91eb4f15abd8340698fa758123)
:   gplazma-fermi: add mapping plugin to support VO group and username from file

[347aedb537](https://github.com/dcache/dcache/commit/347aedb53726344cf81c31703bcb4f5bdd42d14f)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.9

### Changes affecting multiple services

This version removes the (by now unused) directory /var/lib/cell-info
from a default installation. The directory was previously used to store
cell info data. With the introduction of the history service in dCache 3.2.1,
this became obsolete.

A small bug-fix addresses wrong directory permissions on tar or Debian
packages, where the directory /var/lib/dcache/pool-history had the
wrong permissions.

The deprecated properties for configuring alarms have now finally been made 
unavailable.

### chimera

An internal update enables chimera to use PostgreSQL 10.

### nfs

A modification in IP address handling greatly increases the speed of 
NFS client access for Linux clients in mixed IPv4/IPv6 environments.

Prior to Linux 4.12, Linux clients with only an IPv4 address would wait
for (timeout * retry) seconds when connecting to pools with both a v4 and v6 
address. This was [fixed upstream in Linux 4.12](https://github.com/torvalds/linux/commit/6ea44adce91526700535b3150f77f8639ae8c82d), but that fix was not
backported to e.g. RHEL 7 yet.  


### Changelog 4.0.8..4.0.9

<!-- git log 4.0.8..4.0.9 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[2f76e7a4a9](https://github.com/dcache/dcache/commit/2f76e7a4a98222bedb9e117d1265bd281244939c)
:   [maven-release-plugin] prepare release 4.0.9

[8a0338b78c](https://github.com/dcache/dcache/commit/8a0338b78c6d0305ab2d82577084802ac11b879c)
:   nfs: filter out IPv6 DS addresses if client connected with v4

[b7c2e58c40](https://github.com/dcache/dcache/commit/b7c2e58c405d8f5d513db3ed18b1620bffea755d)
:   chimera: adjust postgres driver provider to new version schema

[67ff8d620d](https://github.com/dcache/dcache/commit/67ff8d620d3e03df740de006c3df78f127a90f46)
:   [maven-release-plugin] prepare for next development iteration

[210c68ce85](https://github.com/dcache/dcache/commit/210c68ce85d4412312753858773973933ebccd12)
:   skel: remove extraneous cell-info dir

[0039f4f881](https://github.com/dcache/dcache/commit/0039f4f8815e1be13bfd71e664a20f39c5a636da)
:   packaging: add missing chown and chmod on pool-history

[3ed5e40382](https://github.com/dcache/dcache/commit/3ed5e40382d64e31fb04f4fd2939b63aa760e181)
:   skel: make deprecated alarms properties forbidden

## Release 4.0.8

### dcache-frontend

When the history service was not running or there were other issues
with pool connectivity, this was leading to incomplete or missing
JSON data from the history service. This is now fixed.

### webdav

dCache now supports  RFC 3230 clients that request digests using multiple HTTP
headers.


### Changelog 4.0.7..4.0.8

<!-- git log 4.0.7..4.0.8 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[9ccc4f2](https://github.com/dcache/dcache/commit/9ccc4f2e611f37e11ccb96074b6ccbe2640eb8ba)
:   [maven-release-plugin] prepare release 4.0.8

[6bc0ec2](https://github.com/dcache/dcache/commit/6bc0ec2143290dc9ff351eac5581188379eb3cbd)
:   webdav: support multiple RFC 3230 'Want-Digest' headers

[5dcc727](https://github.com/dcache/dcache/commit/5dcc727f3ac29e0af95d366b5550f993fa595beb)
:   dcache-frontend: avoid null dereferencing for incomplete pool history data

[9f095f9](https://github.com/dcache/dcache/commit/9f095f9c32448b6c4ce8c3edf1fc6877fec7c17c)
:   dcache: avoid NPE from initialization race in RestoreRequestsReceiver in HttpPooMgrEngineV3

[099b96a](https://github.com/dcache/dcache/commit/099b96aa2b78e1182ceded69a563511c5a77be57)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.7

### resilience

Logging for cases where file replication was fatally aborted was improved. Previously, alarms 
messages pertained to the PNFSID of the affected files. In rare cases, like when facing 
network congestion, many hundreds of alarms could be created. With this change, alarms messages
refer to the storage unit, and a suffix based on an hourly timestamp is added to the 
alarm message. The alarm will thus be incremented during the hour but a new
alarm will be created (only) hourly; in this way, those receiving
email alerts will receive them once an hour.


### Changelog 4.0.6..4.0.7

<!-- git log 4.0.6..4.0.7 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[f2aeaa9cc0](https://github.com/dcache/dcache/commit/f2aeaa9cc0d6ecdfbd5ff28ec819efb199814da4)
:   [maven-release-plugin] prepare release 4.0.7

[af00a51946](https://github.com/dcache/dcache/commit/af00a51946921fc557f6aa8b7d1197a9ff8268bc)
:   alarms: fix broken path

[215206dd06](https://github.com/dcache/dcache/commit/215206dd06d0fa7f7178376ded5669b32a7a920e)
:   [maven-release-plugin] prepare for next development iteration

[c987846933](https://github.com/dcache/dcache/commit/c987846933f686c9def0814b05c046b3d316df81)
:   substituted Calendar for Instance which was failing.

[d2721111b9](https://github.com/dcache/dcache/commit/d2721111b928b7a8989b10bc20640cc522ad56df)
:   dcache-resilience: avoid spamming alarms with abort messages

## Release 4.0.6

### ftp

A bug (that was not observed in real-world settings yet) that might have caused
NullPointerExceptions was fixed in the ftp service.

### httpd

dCache will no longer log a stack-trace if HTTP
requests are made asking for information from the info service when the
info service is not running.

### poolmanager

An earlier change in PoolManager introduced regular broadcasting of the 
stage request queue to various internal listeners. In some cases, this
could lead to erroneous NoRouteToHost  error messages being logged. These
error messages are now being suppressed.

dCache 3.0 introduced a regression where a dCache domain does not
start up if it hosts a poolmanager with poolmanager.conf containing
either the "rc set sameHostCopy" or the "rc set sameHostRetry" command.
This regression was fixed.

### resilience

Error handling within the Resilience service was improved.


### Changelog 4.0.5..4.0.6

<!-- git log 4.0.5..4.0.6 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[44480946d6](https://github.com/dcache/dcache/commit/44480946d68ccd25636e69b820e63b8547f76b0b)
:   [maven-release-plugin] prepare release 4.0.6

[483a90aeda](https://github.com/dcache/dcache/commit/483a90aeda37bde71b29832ca96e52f55da3a3dc)
:   dcache-resilience: handle properly RuntimeExceptions from tasks

[1bc74ba32b](https://github.com/dcache/dcache/commit/1bc74ba32babf0e03116d0d0a3a52d5d7b6b7638)
:   ftp: ensure adapter is closed

[ea690bd082](https://github.com/dcache/dcache/commit/ea690bd08243d762e3c2fa11ef76f92b9673c1d2)
:   ftp: remove rare NullPointerException when proxying data

[775cd7a7f4](https://github.com/dcache/dcache/commit/775cd7a7f418e1c6ac3a0d9161427236d9aa2329)
:   httpd: do not log an exception if info cell not running

[26771a24b2](https://github.com/dcache/dcache/commit/26771a24b2c4a2aab870b67708a046f5543ff1c2)
:   poolmanager: silence NoRouteToCell for stage queue topic

[51c0a3f5c3](https://github.com/dcache/dcache/commit/51c0a3f5c34478d4189acbd59895df9bcc953c8c)
:   poolmanager: fix poolmanager startup with certain poolmanager.conf content

[5a7e6775d3](https://github.com/dcache/dcache/commit/5a7e6775d3fc710abb7cc21a9060209768f98369)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.5

### dcache-resilience

When a checksum or broken file message/error is generated,
Resilience makes a best effort to (a) remove the broken
copy and (b) make another replica. This, of course, is not always possible, particularly if
the broken file is the only accessible copy. This resulted in  faulty behavior 
 particularly the thrashing noted in the case of a restaging operation which results in a checksum error.
This is now fixed.

The current release improved error handling for resilience. 
It fixed  unnecessary Migration Task exceptions resulting from
source pools with no replica in the repository.

Now  it should be possible for Resilience to use pools blocked only for
writes from doors.

### packaging

Upgrading to dCache v3.2 (or newer) was resulting  in a broken dCache
installation due to a missing `services.sh` file. This is now fixed and
upgrade to dCache v3.2 (or newer) from dCache v3.1 (or older) no longer
breaks dCache by removing /usr/share/dcache/lib/services.sh.


### Changelog 4.0.4..4.0.5

<!-- git log 4.0.4..4.0.5 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[929693c](https://github.com/dcache/dcache/commit/929693c0981c26c2a3fb6a8d1610a8cba2bde2d1)
:   [maven-release-plugin] prepare release 4.0.5

[0468c8b](https://github.com/dcache/dcache/commit/0468c8b793d2db17be20ccdd672d7329ce601881)
:   bad commit put DOWN twice

[b6f229b](https://github.com/dcache/dcache/commit/b6f229bdd13f3fdaffee6e2f3834070d70d8273e)
:   dcache-resilience: define non-writable pool to mean p2p-client is disabled

[f0000cd](https://github.com/dcache/dcache/commit/f0000cd75b0764426ebfb6276cca9ac2edd8728a)
:   dcache: fix remote pool monitor wait bug

[dcec6c5](https://github.com/dcache/dcache/commit/dcec6c5edd6ff942e20d794e3720e5d17f9a3aea)
:   dcache-resilience: repair handling of broken files*

[3d0bff3](https://github.com/dcache/dcache/commit/3d0bff3bcf14122ab1531761fdd404ce285fa71e)
:   packaging: check 'services.sh' after old rpm removed

[1b6734b](https://github.com/dcache/dcache/commit/1b6734b606fcf467198f3ff85af471c14e7f60b4)
:   [maven-release-plugin] prepare for next development iteration

[4f991cf](https://github.com/dcache/dcache/commit/4f991cf7a36a9191cf4b50990e936f92043062dc)
:   dcache-resilience: fix bug in source handling with Clear Cache Location messages

## Release 4.0.4

### cells

The current release added explicit ZooKeeper/Curator monitoring. Events generated by ZooKeeper and Curator are now logged in a new, which  may help diagnose
problems that are suspected to come from bad ZooKeeper interaction.

### frontend

The current release improved the error handling to work with Jackson exceptions.


### Changelog 4.0.3..4.0.4

<!-- git log 4.0.3..4.0.4 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[721c637](https://github.com/dcache/dcache/commit/721c637557337beab5b8c5f5d5b6570d5597a20f)
:   [maven-release-plugin] prepare release 4.0.4

[4f05a13](https://github.com/dcache/dcache/commit/4f05a13305b85bb12393b70e6206e1826a44c5be)
:   dcache-resilience: fix wrong assumption about error type in Message

[a667e11](https://github.com/dcache/dcache/commit/a667e1193df4a75ad5df911cadb6a16223f5d4f1)
:   cells: add explicit ZooKeeper/Curator monitoring

[6e3f58d](https://github.com/dcache/dcache/commit/6e3f58d46c58bfa9eab1f9d2671a82076ff164f9)
:   frontend: Map requests with bad JSON to HTTP 400 Bad Request status code

[8091927](https://github.com/dcache/dcache/commit/80919278cff5176978a2ac0575ebb300f0676ffe)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.3

### nfs

NFS door has been updated  to return NFS4ERR_LAYOUTUNAVAILABLE for DOT files.

### star

The current release improved documentation to help  dCache admins to  have a better understanding of how to generate StAR record.

The current release fixed fix printing exception error message for dcache-star script if there's a problem when run with newer versions of Python.


### Changelog 4.0.2..4.0.3

<!-- git log 4.0.2..4.0.3 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[c0d95dc](https://github.com/dcache/dcache/commit/c0d95dcc2fd4ea4afb1bbba5b3cb581e98cb6173)
:   [maven-release-plugin] prepare release 4.0.3

[acf2137](https://github.com/dcache/dcache/commit/acf2137d1974a37a642e3dd9c43557e93ef518fe)
:   nfs: return LAYOUTUNAVAILABLE for DOT files

[feb0d3c](https://github.com/dcache/dcache/commit/feb0d3c48ad83dfc17ab777d70d921f178a00914)
:   star: fix printing exception error message

[fd66ac6](https://github.com/dcache/dcache/commit/fd66ac6f920e4207ad407b04eb66f5b53e5b974a)
:   star: update documentation to provide better description of script

[00e7464](https://github.com/dcache/dcache/commit/00e746475f876f6b197b75a62ac45cbf246790d1)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.2

### gplazma

A previous release introduced the possibility of several authenticatio
plugins cooperating in setting primary group IDs. This patch updates
the multimap plugin so that it can also be used in such a scenario.

### info

The info service collects information about who is allowed to reserve space. 
Since some of this information, like VOs, usernames and gids, may be considered
sensitive information, this update allows admins to control whether or not 
to publish them. The default behaviour is unchanged from the previous behaviour,
i.e. info publishes everything. If a site admin wants to change this,
the `info.limits.show-only-vo-authz` property can be set to `true`.

### nfs

Accessing a nonexisting file on recent NFS implementations could cause a 
FileNotFoundChimeraFsException, which is now caught and properly handled. 

### pool

In rare circumstances, running `info` on a pool could cause a
NullPointerException. This issue has been fixed.

### scripts

The dcache script and manpage still refered explicitely to Java 6. This patch
changes the phrasing of the respective text.


### Changelog 4.0.1..4.0.2

<!-- git log 4.0.1..4.0.2 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[cd1ebaae54](https://github.com/dcache/dcache/commit/cd1ebaae54d2640b0aa545c2b5de5337d4d1a9b6)
:   [maven-release-plugin] prepare release 4.0.2

[39127754f4](https://github.com/dcache/dcache/commit/39127754f4a6e9e04e70b1cadae8e3ad89d5b855)
:   nfs: fix ServerFault on FileNotFoundHimeraFsException

[c867d0cad6](https://github.com/dcache/dcache/commit/c867d0cad664f802f000feb13bce1b3c47555959)
:   [maven-release-plugin] prepare for next development iteration

[6df84ff96b](https://github.com/dcache/dcache/commit/6df84ff96b8ad30dd627908377fe4fecae59b9ea)
:   scripts: update reference to JDK to avoid mentioning specific java version

[7724b0693a](https://github.com/dcache/dcache/commit/7724b0693ae40a09c8fa9aeeeabfec7dd07ed063)
:   info: allow admin to control whether non-VO / non-FQAN identities are shown

[743093ffcb](https://github.com/dcache/dcache/commit/743093ffcb4557b349df24544b69cbafd805d434)
:   authentication: update multimap to cooperate in generating primary gids

[29c0144cd1](https://github.com/dcache/dcache/commit/29c0144cd1cb0fc20b954eff737b09ad706bd11f)
:   pools: fix NPE from info command at startup

## Release 4.0.1

### chimera

A database deadlock was observed in some rare situations with the latest
3.2 releases. This patch resolves the issue, ensuring trouble-free
chimera operation.


### Changelog 4.0.0..4.0.1

<!-- git log 4.0.0..4.0.1 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[bc32f2c4be](https://github.com/dcache/dcache/commit/bc32f2c4bee3dd2226ab002638fc47eabee71765)
:   [maven-release-plugin] prepare release 4.0.1

[596a316dfb](https://github.com/dcache/dcache/commit/596a316dfbd0303df2173e716a05b4ec8294f1c8)
:   chimera: fix deadlock in Postgres driver

[96a77e3a9f](https://github.com/dcache/dcache/commit/96a77e3a9f9ae080ca0eacbee6026e4775d32145)
:   [maven-release-plugin] prepare for next development iteration

## Release 4.0.0

### Authentication

gPlazma may be configured so that plugins cooperate in building a list
of gids for an authenticated user. Somtimes it is desirable for "group membership" (i.e. gid principals) to
come from multiple sources; for example, a user who known to dCache
personally and is also asserting their VO membership may wish to access
resources based on her identity or based on her VO membership. The new release
changes the plugins' behaviour so that a plugin only adds the first gid as a primary gid 
if there is no existing primary gid for this user. If there is an
existing primary gid then the gid is still added, but as a secondary
gid. 

### Cells

The `system` cell's 'route' command has been improved so it provides a
nicer layout of information and allows filtering out available routes.

### FTP

As a  workaround for a unusual behaviour in the Globus FTP client, dCache no longer logs 
`java.io.IOException: Connection reset by peer` exceptions.

### httpd

It was necessary to update the status gathering methods to allow for correct reporting in
high availability setups. With the current release, all http and frontend services correctly
report all restore requests anywhere in the system.

### NFS

dCache's NFS implementation now supports `COMMIT` operations. 

### Poolmanager

Timeouts in contacting PoolManager no longer result in a stack-trace
being logged.

### RESTful API

With this release, an extensive set of RESTful information services is now available.
The APIs will soon be published separately with documentation.  All of the
services are reachable via the https port 3880.   For the most part, these
services implement GET to return JSON objects describing dCache state.

The basic paths are:

https://host:3880/api/v1/alarms
https://host:3880/api/v1/billing
https://host:3880/api/v1/cells
https://host:3880/api/v1/namespace
https://host:3880/api/v1/id
https://host:3880/api/v1/links
https://host:3880/api/v1/partitions
https://host:3880/api/v1/poolgroups
https://host:3880/api/v1/pools
https://host:3880/api/v1/pool-preferences
https://host:3880/api/v1/restores
https://host:3880/api/v1/units
https://host:3880/api/v1/transfers

From them it is possible to obtain such things as lists of billing records
for a given file, full information on a given pool, including current queue activity,
a list of transfers or restores for a given file, histogram data for pool queues, etc.

Most of these services require the user to have admin authorization and
to express the 'admin' role.   For instance:

curl -k -u $USERNAME#admin:$PASSWD 'https://host:3880/api/v1/billing/reads/$PNFSID'

Fuller information on the subpaths, parameters and descriptions of the
JSON objects returned is forthcoming.

### Scripts 

dCache-StAR now supports PostgreSQL servers on non-standard ports.

The installation on RPM-based systems will now ensure that the user `dcache` is a member of the group `dcache`,
ensuring that admin ssh keys are usable.

### Spacemanager

Error reporting was improved for cases where a user tries to upload into dCache using a space-token where there
is no selectable link for this operation. The error message now includes more details.

### SRM

dCache now allows an SRM client to specify from which linkgroup a
reservation should be made:

dCache, in general, supports space reservation through linkgroups: each space
reservation is bound to a particular linkgroup.  Uploads involving a
reservation automatically select that linkgroup. 

Each linkgroup has an independent set of links.  The set of links within
a single linkgroup may be configured to accept only a subset of all
upload requests; for example, only uploads into a particular path (i.e.,
a specific storage class).

If dCache is configured with more than one linkgroup then it is possible
that an upload is allowed by one linkgroup, but is not acceptable to
another.  Attempts to upload with a reservation made from the "wrong"
linkgroup will fail. Therefore, the user may care from which linkgroup a
reservation is made.

### SRM Manager

If an old configuration still contains references to either of the deprecated 
properties srmmanager.net.port or srmmanager.net.local-hosts, the move away from
these old properties is now documented better.

### Systemtest

Since OpenSSL changed the format of DN strings from a slash-separated to a comma-separated one,
systemtest needed to be updated to work with the new format. 

### WebDAV

dCache now supports RFC 3230-style Want-Digest headers. These allow clients to request 
specific checksumming algorithms. 

WebDAV now issues a warning when https redirects are enabled as, in that situation,
authentication will be done over https but files will be transfered over plain http.

The WebDAV protocol includes a special return code to indicate that a
PUT request was denied because the filesystem is full: 507 Insufficient
Storage. This code is now returned in case the underlying dCache system 
has no available space left.

### xrootd

The xrootd implementation now supports the flag `kxr_posc`, available for the `kXR_open` operation. 
In cases where files may be created but (perhaps due to errors) not properly closed, files could 
end up abandoned with a 0-byte file size. This flag may be used to switch
between two behaviours: having the flag set will persist the file, having it unset will ensure
that such files are cleaned up.

### Changelog from 3.2.0 to 4.0.0

<!-- git log 3.2..4.0 -no-merges -format='[%h](https://github.com/dcache/dcache/commit/%H)%n:   %s%n' -->

[0593745d10](https://github.com/dcache/dcache/commit/0593745d1057ee58880acbdcdd3c6c87941839e8)
:   [maven-release-plugin] prepare branch 4.0

[d1aaa0cd0f](https://github.com/dcache/dcache/commit/d1aaa0cd0f95b3854c201bbcb1d7e5e6766a1eea)
:   authentication: allow plugins to cooperate in generating gids

[0576e8a571](https://github.com/dcache/dcache/commit/0576e8a5716396a0e5711d6b0fc4cf1c9fb8f932)
:   webdav.properties: warn about redirects to http.

[55375da263](https://github.com/dcache/dcache/commit/55375da2635feb405b01cdd66e659ab96f048550)
:   systemtest: work with new OpenSSL DN format

[c7960f1df9](https://github.com/dcache/dcache/commit/c7960f1df99e522e3ee534a7e713e49a0113b74f)
:   spacemanager: allow SRM clients to specify linkgroup in reserve requests

[2e10b3df7e](https://github.com/dcache/dcache/commit/2e10b3df7e6d62c247bff4919a57177bf7b9bfb4)
:   srmclient: add support for specifying linkgroup when reserving space

[cbb7868d7b](https://github.com/dcache/dcache/commit/cbb7868d7bf0e7309a3727369d93b65bdb350745)
:   pom: update postgres jdbc driver and HikariCP

[50f7d3b22d](https://github.com/dcache/dcache/commit/50f7d3b22d83451eab314c5652318e4bf45ac12e)
:   dcache-frontend: set killed mover status to CANCELLED on transfer shapshot

[1e2d6a1bb4](https://github.com/dcache/dcache/commit/1e2d6a1bb47a09dc9a34fcc6cb16030708b62f2d)
:   spacemanager: provide space-specific error message on bad upload

[c86eed2b89](https://github.com/dcache/dcache/commit/c86eed2b89901dce113255b2fad8a189a200fec8)
:   webdav: return 507 Insufficient Storage when dCache is full

[d905594c23](https://github.com/dcache/dcache/commit/d905594c235ea2d01db6a6ba0a47cf5948029e74)
:   pnfsmanager: update slow logging admin command help

[38c76ed832](https://github.com/dcache/dcache/commit/38c76ed8322005dc280e63899811bd683aca30f1)
:   dcache-frontend, pools: implement filtering, sorting and paging for pool activity requests

[9a7c8af747](https://github.com/dcache/dcache/commit/9a7c8af747d4a1e4f1418c8ce3e9a9b01bab64bd)
:   dcache-frontend, billing: implement sorting, filtering and paging for record requests

[4a2c45b0b3](https://github.com/dcache/dcache/commit/4a2c45b0b3a5c3c60a010d5a8fb4280c45c28880)
:   dcache-frontend: pool info API changes to support sorting and filtering

[b8f1a7f8e0](https://github.com/dcache/dcache/commit/b8f1a7f8e0d7595676a0a239692055faa1e0bb67)
:   dcache-frontend: billing API changes to support filtering and sorting

[3b31bcc56a](https://github.com/dcache/dcache/commit/3b31bcc56a345eb38101cff45b836b018cd5d933)
:   dcache-frontend: refactor selection resource

[7bedc8c956](https://github.com/dcache/dcache/commit/7bedc8c95658557975e2bd7659e695085e893683)
:   nfs: fix transfer leak, if the door failed to start a mover

[f06bbb7479](https://github.com/dcache/dcache/commit/f06bbb7479181531836cd4bd52cc6b6efdb32f6d)
:   httpd, dcache-frontend: support requests for restore listing when there are multiple pool managers

[7d0435cd2b](https://github.com/dcache/dcache/commit/7d0435cd2b18e0e99750f127235b231833b408ed)
:   pool: fix double logging on remote FTP transfer error

[311718f650](https://github.com/dcache/dcache/commit/311718f650bd333a00e8576b41efddd9b5fea0c1)
:   srmclient: avoid stack-trace and repeated logging

[b905d49c43](https://github.com/dcache/dcache/commit/b905d49c43b7826742b8916409f110b42948951b)
:   srmmanager: provide better hints on obsolete properties

[7b08a3a660](https://github.com/dcache/dcache/commit/7b08a3a660841c9a7a6af531a0a8a0985020d6aa)
:   pool: Fix how certain bugs are logged

[08d93a5817](https://github.com/dcache/dcache/commit/08d93a5817b16a8e65fcf88078b92da0a3f08a45)
:   star: support PostgreSQL running on non-standard TCP ports

[46b4598c30](https://github.com/dcache/dcache/commit/46b4598c30a74f3621486bd0cc123cc9a9860b02)
:   rpm: don't assume existing dcache user is member of dcache group

[334488d193](https://github.com/dcache/dcache/commit/334488d193b23f2e5072fe092daac73a4bdc4b54)
:   cells: don't log stack-trace on starting cell with same name as running cell

[6c6fdc07b7](https://github.com/dcache/dcache/commit/6c6fdc07b70ae3c71491693219a231a984c37a76)
:   statistics: avoid stack-trace on internal timeout

[832bd860b4](https://github.com/dcache/dcache/commit/832bd860b46a8e374877616517b20080d1d70bff)
:   nfs: fix documentation of nfs.enable.pnfsmanager-query-on-move

[8172371192](https://github.com/dcache/dcache/commit/81723711924e275c36416a34727703a398c5efda)
:   admin: do not report attempts to connect to missing cell as a bug

[ee416ed05e](https://github.com/dcache/dcache/commit/ee416ed05e413cc7bb40cfc478e76373edf6ea88)
:   cleaner: shutdown cleanly

[62ca394df9](https://github.com/dcache/dcache/commit/62ca394df9147a0e900f5047114abeaccfb26143)
:   maven: include dcache.service in Debian packages

[8e93126fcb](https://github.com/dcache/dcache/commit/8e93126fcbe0ea1cdf41eaa18df80d27040a647a)
:   pool: fix stack-trace when closing dcap mover connection

[2dfc71f598](https://github.com/dcache/dcache/commit/2dfc71f5983a0030f74d93d1d7dfb630da564da9)
:   admin: upgrade sshd library to 1.6.0

[81e9d17a2c](https://github.com/dcache/dcache/commit/81e9d17a2cd612356157fd26798c5884949c704c)
:   httpd: return 404 status code on an unknown page

[3bc9c497f1](https://github.com/dcache/dcache/commit/3bc9c497f194cfdcdf0515775d538ec53967685e)
:   systemd: adding a global dcache.service which pulls in dcache@*.service

[304374339f](https://github.com/dcache/dcache/commit/304374339f40ee5de5171bec798d9d3d81bade00)
:   packaging: include empty var directory: 'cell-info'

[83ef9ffa71](https://github.com/dcache/dcache/commit/83ef9ffa71d16fd789abc18c9b13fc7d9ca07b21)
:   dcache-frontend: eliminate stray spring resource

[13a5760baa](https://github.com/dcache/dcache/commit/13a5760baa3f39e915f0ba6ae9e33f80e321e083)
:   dcache-frontend: modify pool and pool group API to be more consistent

[bde210e528](https://github.com/dcache/dcache/commit/bde210e52860be9e89787e4e303f85f9d1b30121)
:   webdav: add support for RFC 3230 Want-Digest on PUT requests

[c5650e729f](https://github.com/dcache/dcache/commit/c5650e729f6404f5b05641857945cca898f6df7d)
:   chimera: update schema migration when creating 'lost+found' directory.

[dea4beb746](https://github.com/dcache/dcache/commit/dea4beb746923e6024b8fb6cf94d00e7e0f5468b)
:   caretaker: switch Optional from Guava to Java-8

[2c75e5a111](https://github.com/dcache/dcache/commit/2c75e5a1116a70fba52eb51cdd6cffc44c0a9c18)
:   pool: fix stack-trace on bad command input

[b14f37759a](https://github.com/dcache/dcache/commit/b14f37759ad0a18b0f335fd2e349f38c63b14a97)
:   pool: fix stacktrace on FaultEvent logging

[bb14aa3203](https://github.com/dcache/dcache/commit/bb14aa32037fda4b2599a43101366709bee631d6)
:   system: Don't log stack-trace on fatal JVM error

[af0a7cd9d8](https://github.com/dcache/dcache/commit/af0a7cd9d858f76b4e7ee5e434e1fbddf47ceabb)
:   webdav: restrict RFC 3230 Digest to requested algorithm

[aa7975668b](https://github.com/dcache/dcache/commit/aa7975668b76fc682fc4cc1d7fa8b8d79a2e1291)
:   switch to rsyslog v8 configuration language

[2ece2fbb95](https://github.com/dcache/dcache/commit/2ece2fbb95b3cef82930c119291544117a36ebc6)
:   move logfiles back to /var/log/dcache

[3ae071ebe8](https://github.com/dcache/dcache/commit/3ae071ebe8320133a0a9f8684fd42d4e2af78eac)
:   dcache-frontend: fix ConcurrentModificationException in ReadWriteData

[5d612dc12d](https://github.com/dcache/dcache/commit/5d612dc12d2d974a6da852f3664c10f11e4a1665)
:   srmclient: refactor 'srm' helper script, enforcing environment variables

[ccd7d5aaae](https://github.com/dcache/dcache/commit/ccd7d5aaae3042ba0a1ef69dd5148ebc58270825)
:   history: do not block on startup if PoolManager is not running

[e1f4711c9a](https://github.com/dcache/dcache/commit/e1f4711c9ab1345f89c6db5f2ce2e6e0e90c9b24)
:   dcache-chimera:  use Spring to inject resource dependencies for ChimeraCleaner

[c6645eaa09](https://github.com/dcache/dcache/commit/c6645eaa09e29e104e188c001c6e917bc48e640e)
:   systemd: do not explicitly set StandardOutput=

[f91039318a](https://github.com/dcache/dcache/commit/f91039318a1d213b7c313b5856a8981bdb900533)
:   dcache-frontend: add backend filtering and sorting for snapshot services*

[3df441db5e](https://github.com/dcache/dcache/commit/3df441db5ea4a113c5af073305dccf119c65d87e)
:   dcache-frontend: add backend filtering and sorting for alarms service*

[5f0968069f](https://github.com/dcache/dcache/commit/5f0968069f180f34b6c03edda646020583ed8ee3)
:   dcache-frontend: adjust level of timeout logging

[cdf6aaafb4](https://github.com/dcache/dcache/commit/cdf6aaafb4becf54f3b2618b6267c581cb9d7964)
:   dcache-frontend: adjust REST API for Pool Info Resources

[df6493a7b2](https://github.com/dcache/dcache/commit/df6493a7b24fe51feedd2745d631e52a7d651590)
:   dcache-frontend: change alarms service API to include proper PATCH and DELETE calls*

[8135b51ab9](https://github.com/dcache/dcache/commit/8135b51ab947fc5519caee834511a3d51bd500fb)
:   pool: move space allocation into repository channel

[8dbe29df5b](https://github.com/dcache/dcache/commit/8dbe29df5b0b2923f07f61d26c71909bd402e1db)
:   chimera: fix typo in method name

[c6f8f7c917](https://github.com/dcache/dcache/commit/c6f8f7c917a4c966488d0d6697e47006828b5def)
:   statistics: fix race in "create stat" admin command

[6620983d30](https://github.com/dcache/dcache/commit/6620983d3008921dbf4cfb25ca7e79df18b7d8da)
:   webadmin: remove broken css included only for IE

[1e198b0942](https://github.com/dcache/dcache/commit/1e198b09426acb760846b6bc29ee37636941dd54)
:   webadmin: fix CSS in poolgroup view

[dd8c44d4aa](https://github.com/dcache/dcache/commit/dd8c44d4aa6d54f9d2ce4f86e8f6e70b4f2f1c86)
:   ftpclient: use lambdas

[7adf2a0332](https://github.com/dcache/dcache/commit/7adf2a0332d7b06b757add7159d5e2a76275cce2)
:   core: use lambdas

[0a79fd1350](https://github.com/dcache/dcache/commit/0a79fd1350f80017bd1fa8d134f59400f5a6a6c3)
:   srm-common: use lambdas

[bfe8293ddf](https://github.com/dcache/dcache/commit/bfe8293ddf9cb04c05b88e45ede5ec70893bf9c3)
:   srmclient: use lambdas

[1828ab5bc2](https://github.com/dcache/dcache/commit/1828ab5bc2900cab94f601f1bd0cddf8fcb34f98)
:   resilience: use lambdas

[9e2b73bb3b](https://github.com/dcache/dcache/commit/9e2b73bb3b538b877155fe03d680508723147f32)
:   ftp: use lambdas

[66d1bac7fa](https://github.com/dcache/dcache/commit/66d1bac7faf16b5affdde2c36890bbbba410982c)
:   dache-frontend: fix regression in pool info api

[d74096f019](https://github.com/dcache/dcache/commit/d74096f019afa6b700a8b2898520a34bc42352bf)
:   common: use lambdas

[f84ac19091](https://github.com/dcache/dcache/commit/f84ac190912423ce6d57db6e2fe166a4aa80c386)
:   common-security: use lambdas

[e5b62e12ed](https://github.com/dcache/dcache/commit/e5b62e12ed0ab8670977b20c1dc628e585a8cef2)
:   common-cli: use lambdas

[7a28588374](https://github.com/dcache/dcache/commit/7a28588374c442d63d4df74189467ab493760fa4)
:   chimera: use lambdas

[99b9ad4b86](https://github.com/dcache/dcache/commit/99b9ad4b86bd6d5325f8a97bf4397f7313a4f932)
:   srm: fix stacktrace on database failure

[6964af1f37](https://github.com/dcache/dcache/commit/6964af1f37c5f10fa409454f44a700e78d6335e3)
:    dcache-chimera: rename ChimeraCleaner and   RequestTracker

[b6777469d9](https://github.com/dcache/dcache/commit/b6777469d96bd1bc9f739d3398f40259508dce9b)
:   dcache-chimera: move RequestTracker to org.dcache.chimera.namespace

[1a531efd0b](https://github.com/dcache/dcache/commit/1a531efd0bef2715189234719067bace098597fe)
:   dcache-frontend: fix shutdown not to cause stack trace in collection services

[d1187b74ad](https://github.com/dcache/dcache/commit/d1187b74ad2e3a73a46368c0a7b62c9195814bc1)
:   frontend: use Spring to inject resource dependencies

[5b20a52bb3](https://github.com/dcache/dcache/commit/5b20a52bb3572d656a6fc845deca6e9ba37a3d1e)
:   ftp: add work-around for broken Globus FTP client

[d1bdf6fd4e](https://github.com/dcache/dcache/commit/d1bdf6fd4e66c1a2559a0c1bb7af8b0b058b392a)
:   alarms:  revert LogEntry.compareTo() to throw NPE on null object

[f2f9e624a6](https://github.com/dcache/dcache/commit/f2f9e624a6d0f97125059c0fb6830aca0552a010)
:   nfs: change the way how directory cookies are generated

[a5155ffd0a](https://github.com/dcache/dcache/commit/a5155ffd0a291b17888217b81fd2e8ce94e021bb)
:   resilience: force tag partition checking on scans from admin command and periodic checks

[77204df4fe](https://github.com/dcache/dcache/commit/77204df4fe948726edd86bf874411e40210372b4)
:   alarms: fix natural order comparator to use timestamp first

[4adcade245](https://github.com/dcache/dcache/commit/4adcade245cc1ce0e5b0d0761ffdaaf66e7df0e3)
:   frontend: improve consistency in ObjectMapper

[84f61ced67](https://github.com/dcache/dcache/commit/84f61ced67265b4d73391971cfb7010d9af844cb)
:   nfs: fix COMMIT operation sent to pools

[5f08bd71f4](https://github.com/dcache/dcache/commit/5f08bd71f47acef2683e4265dff8fd48fc2981a4)
:   frontend: consistent naming and placement

[27607d17dd](https://github.com/dcache/dcache/commit/27607d17dd29929c7b2df333ef7bae627b7909b9)
:   frontend: use Spring to create resource objects

[fa177dad34](https://github.com/dcache/dcache/commit/fa177dad348f8407b0373c53dcda77c314f85105)
:   pool: refactor ChecksumMover interface

[c236c4df31](https://github.com/dcache/dcache/commit/c236c4df310bae908dc87e7e9697d979051bb555)
:   pool: light refactoring of ChecksumModule

[8a53321c87](https://github.com/dcache/dcache/commit/8a53321c8798e7c19daef93d4efcad430c5fff83)
:   frontend: serialise Java List objects as JSON List

[63d8375a70](https://github.com/dcache/dcache/commit/63d8375a708d292ddc6b680100fd2acfa77ff3de)
:   pool: remove call to removed command

[4038a2ed9f](https://github.com/dcache/dcache/commit/4038a2ed9fb79c645db2631f331cc6fc53d6cc9f)
:   alarms: fix shutdown timeout

[617b74e55f](https://github.com/dcache/dcache/commit/617b74e55fc2f51ac0d430d785cb01d4e588d6cd)
:   nfs: use verifier4#valueOf() to create verifier from a log value

[9c4e1c6841](https://github.com/dcache/dcache/commit/9c4e1c68418eac9601d507f249d8560dbd082351)
:   dcache-restful-api: batch POST and DELETE on alarms

[bcde997e17](https://github.com/dcache/dcache/commit/bcde997e176a5c96088787024d66b29f552c783b)
:   checksums: minor refactor and drop some dead code

[6f1eab5337](https://github.com/dcache/dcache/commit/6f1eab5337aced41f7ef671d0e600eb5962e6536)
:   pool: bypass checksum validation if namespace does have a current value

[201635ed64](https://github.com/dcache/dcache/commit/201635ed64fa8aba20e2a9589fcdd6404a386ab6)
:   frontend: upgrade to jersey v2.26

[6d93ee6f52](https://github.com/dcache/dcache/commit/6d93ee6f52c86f7a9b0a0ff65b904421127d3f6e)
:   frontend: refactor requestor's identity handling

[8ba8a40d02](https://github.com/dcache/dcache/commit/8ba8a40d021b2c402028479c25987ae802b57e53)
:   pool: avoid 'null' and other nondescript error messages

[a482edd29a](https://github.com/dcache/dcache/commit/a482edd29a7fa3150adf3dc9afc1e401078193e2)
:   core: don't use Jersey's repackaged Guava

[fefa20ec11](https://github.com/dcache/dcache/commit/fefa20ec1195ef9f73821d0d3a2e0b97ce932826)
:   pool: refactor String.format log messages

[377abd9651](https://github.com/dcache/dcache/commit/377abd9651c9bb62b9f0ad7c8de16faea8fff00a)
:   cells: update route commands

[3bb13fb12a](https://github.com/dcache/dcache/commit/3bb13fb12afbf0f2a1d2a720691eac3622d72952)
:   dcache-restful-api: change the way in which transfers and restores support paging

[f689473727](https://github.com/dcache/dcache/commit/f6894737273a65aa0d2f4481a6ea0f419e20aa73)
:   nfs: fix server error when processing access log

[def4b6e7c7](https://github.com/dcache/dcache/commit/def4b6e7c75a7a290dd66e8fa92fcdaa6eaa39ac)
:   nearline-storage: pass allocator to NearlineStorageHandler

[e3ad2a513b](https://github.com/dcache/dcache/commit/e3ad2a513bbeb6846454fbede5ec1199f03bb118)
:   dcap: add TTL information to dcap messages

[4c66ad3bee](https://github.com/dcache/dcache/commit/4c66ad3bee34e17cc8e00c06ce7588c1294e19c3)
:   alarms: remove default value for LogEntry received

[00ecfe01af](https://github.com/dcache/dcache/commit/00ecfe01afedafbe032fd145a2449c574e92c745)
:   dcache-restful-api: add offset and limit to fetch of alarms

[02daf8d4f7](https://github.com/dcache/dcache/commit/02daf8d4f718188c1fee61a45896e204731fc01d)
:   many: add diagnostic information about remote pool monitor

[f599f12a61](https://github.com/dcache/dcache/commit/f599f12a619d89eca59169ee0ab8c032fa68da92)
:   pool: dont disable pool if mover cancelled before open

[cae812b42f](https://github.com/dcache/dcache/commit/cae812b42f98d04148e166329983d179465d90f3)
:   systemtest: authorise developer to login as 'admin' via ssh

[8f7bc92668](https://github.com/dcache/dcache/commit/8f7bc92668aea0cd8940feec8b941c6e4b675c59)
:   nfs: let nfs door to use existing file location on write

[36f471d65e](https://github.com/dcache/dcache/commit/36f471d65e8b823ff8a9a5eb87adbf6dc86770b2)
:   nfs: fix invalid condition test in access log processing

[5515fe429e](https://github.com/dcache/dcache/commit/5515fe429eaac8f32279e127220846735d024276)
:   dcache: add elapsed time to NearlineData JSON

[c45da5d55e](https://github.com/dcache/dcache/commit/c45da5d55e3dc1adfed593c346c25156367b8294)
:   dcache-restful-api: fix configuration bug in billing collection utils

[6f4d59338d](https://github.com/dcache/dcache/commit/6f4d59338d1c55ea344cedeb62e0095cb99fa056)
:   dcache-history: fix bug which forces overwrite of data when pool unavailable

[e4d4a6077e](https://github.com/dcache/dcache/commit/e4d4a6077edb804d80b3622e74df31bbb486ba83)
:   dcache-restful-api: fix aggregation issues for pool info and move aggregation to history service

[ee58ddf08a](https://github.com/dcache/dcache/commit/ee58ddf08addae52339464dae3cb8f34d4bb0e68)
:   src: fix broken commit 8e223c53e7e3e80

[8e223c53e7](https://github.com/dcache/dcache/commit/8e223c53e7e3e80110b2c238559dd10084ee4e95)
:   nfs: fix javadoc and remove unused imports

[16c5abf9e8](https://github.com/dcache/dcache/commit/16c5abf9e8e5b3ca3800f5dd9313e0c5ef553922)
:   dcache: fix NPE bug in TransferInfo.toFormattedString

[31fb29e6a3](https://github.com/dcache/dcache/commit/31fb29e6a3cbec25016ff416100b824724261ec7)
:   vehicles: use telescopic constructors for PnfsClearCacheLocationMessage

[00b52a359a](https://github.com/dcache/dcache/commit/00b52a359ab0162be7311d5b349430d646e62567)
:   dcache-restful-api: avoid NPE in PoolDataRequestProcessor

[3825c16a74](https://github.com/dcache/dcache/commit/3825c16a746558fb9d1e72817216af735be4569a)
:   dcache-restful-api: lower collector timeout defaults

[644b693b07](https://github.com/dcache/dcache/commit/644b693b071209e4e2973fa401d90933c3804762)
:   dcache: fix bug in PoolSelectionUnitV2 match()

[a2f148bbd8](https://github.com/dcache/dcache/commit/a2f148bbd857d2895855520bc2e8dc100daa3cfc)
:   pom: update scala dependencies to version 2.12.3

[57b9646466](https://github.com/dcache/dcache/commit/57b9646466384eea91fb79f9c69e20dc7c93f5fb)
:   dcache-xrootd: Fix login handshake to support xrootd clients (> 4.7.0)

[68050b340e](https://github.com/dcache/dcache/commit/68050b340edf06089a51aba6ca07e80d5d2bf8a0)
:   dcache-restful-api: Add POST for enable/disable or kill mover to pool info service

[d5c39daec3](https://github.com/dcache/dcache/commit/d5c39daec347c5977a0b1c4aaab1cfe1ca607ab9)
:   dcache-restful-api: add selection resource and providers

[4fcb617771](https://github.com/dcache/dcache/commit/4fcb617771e42e4d4d7d705133dd07e5eae0e66e)
:   httpd: restore millis to transfer time for transfers.txt

[f87436d3f2](https://github.com/dcache/dcache/commit/f87436d3f2321c11d0536904174ee61332c216ef)
:   dcache-xrootd: (WIP) Add support to the xrootd (kxr_)posc flag in (kXR_)open.

[fbdef471bd](https://github.com/dcache/dcache/commit/fbdef471bd728403ad06f6e7f4a205f1e1542be9)
:   pool: introduce ForwardingRepositoryChannel - a RepositoryChannel decorator

[7cdd8d1820](https://github.com/dcache/dcache/commit/7cdd8d1820c3896894352b3366c0b51ee9860db0)
:   pool: fix log and alarms duplication when rebuilding broken entry

[0893a6828e](https://github.com/dcache/dcache/commit/0893a6828e41249930f36b3aa2f9b71571db812d)
:   pool: remove deprecated command

[182e1d2c08](https://github.com/dcache/dcache/commit/182e1d2c081b9ef88d4dc36d629fdf9df085ee88)
:   checksums: remove unnecessary Checksum#forType static method

[85128586b0](https://github.com/dcache/dcache/commit/85128586b0b4ad784a9d8891a4a05cabdf65be1b)
:   checksums: remove unnecessary parseChecksum call

[6f5da5592e](https://github.com/dcache/dcache/commit/6f5da5592edf157a48481e3c5677bc4cd47d3983)
:   checksum: drop ChecksumFactory

[7b8702c012](https://github.com/dcache/dcache/commit/7b8702c0128b549d0c8c0e3763c14fed6cfa0dd4)
:   cells: better error reporting to ensure bugs are understood

[66eb380a4e](https://github.com/dcache/dcache/commit/66eb380a4ea1ec7b6d2fd7c8c43130a773f2adde)
:   webdav: refactor MiltonHandler's support of OPTIONS

[7dc058e7e6](https://github.com/dcache/dcache/commit/7dc058e7e660f1966d18a979c9945d130bf72178)
:   webdav: fix regression in OPTIONS response

[7c7c510b70](https://github.com/dcache/dcache/commit/7c7c510b704af3249e57d8e33dc7c92f361dc374)
:   resilience: use scheduled executor to provide optional task launch delay

[4bed3af3ac](https://github.com/dcache/dcache/commit/4bed3af3aca5ea421f089b9ff42aa4710645d0de)
:   commons: use Guava to generate hexadecimal strings from byte arrays

[87abe73747](https://github.com/dcache/dcache/commit/87abe73747e172b2b8f3bc06e9b30eff35a9fffc)
:   dcache (collection service): handle execution exceptions correctly

[647a82b4b4](https://github.com/dcache/dcache/commit/647a82b4b4550fd294b7ecd632d5dffe1a78d590)
:   libs: update to emergency fix nfs4j-0.15.3

[9d763ab983](https://github.com/dcache/dcache/commit/9d763ab983c70585aa8f3211b03dcf0ad9bf5df3)
:   libs: update nfs4j to version 0.15.2

[b2041cc257](https://github.com/dcache/dcache/commit/b2041cc257f605ee667debcd9d887c4e2d0ac144)
:   pool: support calculating multiple checksums on uploaded data

[cc656a36b3](https://github.com/dcache/dcache/commit/cc656a36b34ecb46d37cf025269fc925fb4286b2)
:   pool: remove more checksum dead code

[d6a55f6bf3](https://github.com/dcache/dcache/commit/d6a55f6bf3045cbb0c0127e1189327b842aebcdc)
:   pool: refactor checksum handling

[dab89fd89d](https://github.com/dcache/dcache/commit/dab89fd89d2ec2ae307cdaa2605928a1b644309f)
:   pool: remove dead checksum code

[8ab445bb00](https://github.com/dcache/dcache/commit/8ab445bb00fdb074cae322f1ad27cbb3e65b7af5)
:   pool: fix data integrity regression for 3rd-party GridFTP pull transfers

[47157c37fc](https://github.com/dcache/dcache/commit/47157c37fc4f11d00949c35191472145c8fd413a)
:   pool: fix regression in GridFTP OPTS CKSM command

[68c1f7c011](https://github.com/dcache/dcache/commit/68c1f7c0110056fbadba351e830b5b260f331329)
:   common: fix time computation in TimeseriesHistogramTest

[9a43bdfe13](https://github.com/dcache/dcache/commit/9a43bdfe138d317040b35ce5a8fc2538d18b66a4)
:   Revert "pool: fix data integrity regression for 3rd-party GridFTP pull transfers"

[0697f4f8ab](https://github.com/dcache/dcache/commit/0697f4f8abbc0757d4ef5ed3fac60705d46ec2ee)
:   pool: fix data integrity regression for 3rd-party GridFTP pull transfers

[9fe1d035c6](https://github.com/dcache/dcache/commit/9fe1d035c66b101d7eed38cb12ef77982ad82348)
:   resilience: handle file deletion during scan correctly

[eff4c847a1](https://github.com/dcache/dcache/commit/eff4c847a144d77281e496548de56081522c8d0a)
:   pool: fix logging in mongoDB metadata repository

[3d265c0333](https://github.com/dcache/dcache/commit/3d265c0333922d6635443e827e6ac9a10b22858e)
:   pool: ceph: ignore file-not-found on remove

[068d9758ba](https://github.com/dcache/dcache/commit/068d9758ba5d551dad4e7967743d79940f069c96)
:   alarms: set severity from priority in request handler

[c65e057bf7](https://github.com/dcache/dcache/commit/c65e057bf7b71dcc9c9890674c42a437266673ac)
:   dcache-restful-api: return incomplete info instead of throwing NoSuchElementException

[7f092c7c16](https://github.com/dcache/dcache/commit/7f092c7c160495bf00c6fad7c69ad4868a04ae1e)
:   resilience: add pool operation logging

[36975ead39](https://github.com/dcache/dcache/commit/36975ead39552aa0e1034a9681d9690e4ed5c49d)
:   resilience: handle storage unit NoSuchElement failure

[5d1e8a7566](https://github.com/dcache/dcache/commit/5d1e8a75661fb150ceef2006509f1684d74434c9)
:   pool: update dcap mover to use ChecksumChannel

[a424af0f61](https://github.com/dcache/dcache/commit/a424af0f61749d391d32938469dc7fd6bd2cb05c)
:   srmclient: parameterise shell path of srmclient utilities

[8893a4f8fc](https://github.com/dcache/dcache/commit/8893a4f8fc21163f48528b62515c7f6eee584cf3)
:   nfs: shutdown callback ScheduledExecutorService on shutdown

[91d32bf275](https://github.com/dcache/dcache/commit/91d32bf275ce1ce778bc43ba115480a0f6868640)
:   pnfsmanager: slight simplication

[2b10acfefd](https://github.com/dcache/dcache/commit/2b10acfefd5aec0777919ba194e4c697d722e659)
:   systemtest: update robot to use system-test's trust-store

[07718e0988](https://github.com/dcache/dcache/commit/07718e098843ea6160e57991dd5aaffa88e19142)
:   pool: small tweaks to IO statistics

[a518121975](https://github.com/dcache/dcache/commit/a5181219752ffcb28c3c341b0c357ab13b10af53)
:   libs: update to nfs4j-0.15.1

[4cfe75ce56](https://github.com/dcache/dcache/commit/4cfe75ce564c6a898062ab8d54992b46e9e6338b)
:   access-log: update nfs door to provide access log

[31fc3a2dcb](https://github.com/dcache/dcache/commit/31fc3a2dcb54b67255e0dc7e935b5e0e9eb90e49)
:   pool: update ftp mover to use ChecksumChannel

[8d6f6bc2a4](https://github.com/dcache/dcache/commit/8d6f6bc2a41e8b959881043e9104683c526fb9c5)
:   webdav: adjust header parsing to be case insensitive

[6cbac61c2e](https://github.com/dcache/dcache/commit/6cbac61c2e1eef9f157641bdd1d5a50ae007f760)
:   ftp-client: refactoring slf4j logging messages

[c18f0882ab](https://github.com/dcache/dcache/commit/c18f0882ab727c06354013fc46c8e1a2ab1ef760)
:   dcache-srm: refactoring slf4j logging messages (#3446)

[51871cb790](https://github.com/dcache/dcache/commit/51871cb790c32e801e8124f026cd60915521caeb)
:   src: replace Guava Methods with native Java alternatives

[19e5cd3b0d](https://github.com/dcache/dcache/commit/19e5cd3b0dfdaa16c107339bcbcb7c881f74e860)
:   cells,dcap,ftp: Support for accepting connections from an allowed list of subnets and IP addresses

[a2a51d1c9f](https://github.com/dcache/dcache/commit/a2a51d1c9f9bfa42015dd18a06db74c45bccc0c7)
:   resilience: handle all cases where no locations for file may be discovered

[0e60fe2373](https://github.com/dcache/dcache/commit/0e60fe2373ee9dad956f7415e1fc49c80724e4a5)
:   resilience: distinguish correctly between file not in repository and file not found

[b15896cfe6](https://github.com/dcache/dcache/commit/b15896cfe6d46b8146130cbdc790b1136180823f)
:   resilience: fix bug in formatting and handling of cache exception types

[3e3c9fc7f2](https://github.com/dcache/dcache/commit/3e3c9fc7f24d5d8877ba496db4783aa67f351238)
:   dcache-restful-api: extract the locations from storage info and add to JSON attributes

[c77b773c5b](https://github.com/dcache/dcache/commit/c77b773c5b5278d15e1f852589ef2e26f8f07aeb)
:   common: fix bug in histogram max index computation

[fa977c66dc](https://github.com/dcache/dcache/commit/fa977c66dc717860505246b1f97ccc032c044441)
:   srmclient: remove non-functioning script with BASH dependencies

[24cbab02ea](https://github.com/dcache/dcache/commit/24cbab02eabe922665460d8365bac61d570f9ac7)
:   [maven-release-plugin] prepare for next development iteration





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